start-ver=1.4 cd-journal=joma no-vol=94 cd-vols= no-issue=1 article-no= start-page=81 end-page=84 dt-received= dt-revised= dt-accepted= dt-pub-year=2005 dt-pub=20050201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Solid-phase Synthesis of Oligosaccharides Using Novel Alkyne-type Linkers -Selection of Reactive Sites on the support by Sonogashira Reaction- kn-title=アルキン型リンカーを用いた糖鎖固相合成--薗頭反応による高反応部位の選択 en-subtitle= kn-subtitle= en-abstract= kn-abstract=Two new alkyne-type linkers having alkynylmethyloxy moieties were elaborated for solid-phase synthesis of oligosaccharide. A propargyl glycoside-type linker between a sugar residue and a solid support was formed by the Sonogashira reaction of a propargyl glycoside with polymer-supported iodobenzene. A propargyl ester-type linker was also constructed by the same reaction of a 4-(proparygyloxycarbonyl)benzyl glycoside with the latter. Both linkers are stable against acids such as TFA but can be readily cleaved with this acid after conversion to the corresponding alkyne-cobalt complex by treatment with Co2(CO)8. The latter ester linker is generally advantageous in that mild cleavage liberates a proceed only at spatially reactive sites on the solid support where the reagent accesses readily, so that the subsequent reactions including glycosylation on solid phase proceeded smoothly to result in high total yields of the desired oligosaccharides. en-copyright= kn-copyright= en-aut-name=IzumiMinoru en-aut-sei=Izumi en-aut-mei=Minoru kn-aut-name=泉実 kn-aut-sei=泉 kn-aut-mei=実 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 en-keyword=oligosaccharides kn-keyword=oligosaccharides en-keyword=solid-phase synthesis kn-keyword=solid-phase synthesis en-keyword=carbohydrates kn-keyword=carbohydrates en-keyword=glycosylation kn-keyword=glycosylation en-keyword=cross-coupling kn-keyword=cross-coupling END start-ver=1.4 cd-journal=joma no-vol=106 cd-vols= no-issue= article-no= start-page=1 end-page=3 dt-received= dt-revised= dt-accepted= dt-pub-year=2017 dt-pub=20170201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Compulsory Repetitive Learning to Improve Student Achievement and Performance in Fundamental Subjects kn-title=半強制的な反復学習による基礎科目の徹底教育 en-subtitle= kn-subtitle= en-abstract= kn-abstract=　We employ the methodology of “Compulsory Repetitive Learning” to improve student learning and performance in fundamental subjects. It is a challenge for many universities to intrinsically motivate students and it is a demanding issue that a large part of students do not sufficiently do homework. Here, we let students solve the problems associated with the teaching immediately following each lecture. Through the usage of “Compulsory Repetitive Learning”, each student as well as the subject teacher(s) could monitor and evaluate the quality of student learning and performance. en-copyright= kn-copyright= en-aut-name=IzumiMinoru en-aut-sei=Izumi en-aut-mei=Minoru kn-aut-name=泉実 kn-aut-sei=泉 kn-aut-mei=実 aut-affil-num=1 ORCID= en-aut-name=MurataYoshiyuki en-aut-sei=Murata en-aut-mei=Yoshiyuki kn-aut-name=村田芳行 kn-aut-sei=村田 kn-aut-mei=芳行 aut-affil-num=2 ORCID= affil-num=1 en-affil=Graduate School of Environmental and life Science, Okayama University kn-affil=岡山大学大学院環境生命科学研究科 affil-num=2 en-affil=Graduate School of Environmental and life Science, Okayama University kn-affil=岡山大学大学院環境生命科学研究科 en-keyword=compulsory repetitive learning kn-keyword=compulsory repetitive learning en-keyword=homework kn-keyword=homework en-keyword=exercises kn-keyword=exercises en-keyword=learning comprehension level kn-keyword=learning comprehension level END start-ver=1.4 cd-journal=joma no-vol=7 cd-vols= no-issue=1 article-no= start-page=8239 end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2017 dt-pub=201708 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Synthesis of Sulfo-Sialic Acid Analogues: Potent Neuraminidase Inhibitors in Regards to Anomeric Functionality en-subtitle= kn-subtitle= en-abstract= kn-abstract= The design, synthesis and application of N-acetylneuraminic acid-derived compounds bearing anomeric sulfo functional groups are described. These novel compounds, which we refer to as sulfo-sialic acid analogues, include 2-decarboxy-2-deoxy-2-sulfo-N-acetylneuraminic acid and its 4-deoxy-3,4-dehydrogenated pseudoglycal. While 2-decarboxy-2-deoxy-2-sulfo-N-acetylneuraminic acid contains no further modifications of the 2-deoxy-pyranose ring, it is still a more potent inhibitor of avian-origin H5N1 neuraminidase (NA) and drug-resistant His275Tyr NA as compared to the oxocarbenium ion transition state analogue 2,3-dehydro-2-deoxy-N-acetylneuraminic acid. The sulfo-sialic acid analogues described in this report are also more potent inhibitors of influenza NA (up to 40-fold) and bacterial NA (up to 8.5-fold) relative to the corresponding anomeric phosphonic acids. These results confirm that this novel anomeric sulfo modification offers great potential to improve the potency of next-generation NA inhibitors including covalent inhibitors. en-copyright= kn-copyright= en-aut-name=VavrickChristopher J. en-aut-sei=Vavrick en-aut-mei=Christopher J. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=MutoChiaki en-aut-sei=Muto en-aut-mei=Chiaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=HasunumaTomohisa en-aut-sei=Hasunuma en-aut-mei=Tomohisa kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=KimuraYoshinobu en-aut-sei=Kimura en-aut-mei=Yoshinobu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=ArakiMichihiro en-aut-sei=Araki en-aut-mei=Michihiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=WuYan en-aut-sei=Wu en-aut-mei=Yan kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=GaoGeorge F. en-aut-sei=Gao en-aut-mei=George F. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=OhruiHiroshi en-aut-sei=Ohrui en-aut-mei=Hiroshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= en-aut-name=IzumiMinoru en-aut-sei=Izumi en-aut-mei=Minoru kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=9 ORCID= en-aut-name=KiyotaHiromasa en-aut-sei=Kiyota en-aut-mei=Hiromasa kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=10 ORCID= affil-num=1 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=2 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=3 en-affil=Graduate School of Science, Technology and Innovation, Kobe University kn-affil= affil-num=4 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=5 en-affil=Graduate School of Science, Technology and Innovation, Kobe University kn-affil= affil-num=6 en-affil=CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences kn-affil= affil-num=7 en-affil=CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences kn-affil= affil-num=8 en-affil=Yokohama College of Pharmacy kn-affil= affil-num=9 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=10 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= END start-ver=1.4 cd-journal=joma no-vol=71 cd-vols= no-issue=4 article-no= start-page=1078 end-page=1082 dt-received= dt-revised= dt-accepted= dt-pub-year=2007 dt-pub=200704 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Synthesis of lipid derivatives of pyrrole polyamide and their biological activity en-subtitle= kn-subtitle= en-abstract= kn-abstract=Novel fatty acyl and phospholipid derivatives of pyrrole polyamide were synthesized. Their cytotoxicity against a cancer cell line of MT-4 cells and those infected by human immunodeficiency virus (HIV) was examined. Although no anti-HIV activity was found, their cytotoxicitty against the cancer cells was significantly enhanced by introducing a lipophilic group into the pyrrole polyamide. en-copyright= kn-copyright= en-aut-name=YamamotoMasahiko en-aut-sei=Yamamoto en-aut-mei=Masahiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=ZhuChangjin en-aut-sei=Zhu en-aut-mei=Changjin kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=YiLui en-aut-sei=Yi en-aut-mei=Lui kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=RongZheng en-aut-sei=Rong en-aut-mei=Zheng kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=MiuraYoshie en-aut-sei=Miura en-aut-mei=Yoshie kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=IzumiMinoru en-aut-sei=Izumi en-aut-mei=Minoru kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=NakajimaShuhei en-aut-sei=Nakajima en-aut-mei=Shuhei kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=TanamotoKen-ichi en-aut-sei=Tanamoto en-aut-mei=Ken-ichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= en-aut-name=ShimizuSakayu en-aut-sei=Shimizu en-aut-mei=Sakayu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=9 ORCID= en-aut-name=BabaNaomichi en-aut-sei=Baba en-aut-mei=Naomichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=10 ORCID= affil-num=1 en-affil= kn-affil=Department of Biofunctional Chemistry, Graduate School of Natural Science and Technology, Okayama University affil-num=2 en-affil= kn-affil=School of Chemical Engineering & Environment, Beijing Institute of Technology affil-num=3 en-affil= kn-affil=School of Chemical Engineering & Environment, Beijing Institute of Technology affil-num=4 en-affil= kn-affil=School of Chemical Engineering & Environment, Beijing Institute of Technology affil-num=5 en-affil= kn-affil=Department of Biofunctional Chemistry, Graduate School of Natural Science and Technology, Okayama University affil-num=6 en-affil= kn-affil=Department of Biofunctional Chemistry, Graduate School of Natural Science and Technology, Okayama University affil-num=7 en-affil= kn-affil=Department of Biofunctional Chemistry, Graduate School of Natural Science and Technology, Okayama University affil-num=8 en-affil= kn-affil=National Institute of Health Sciences, Division of Food Additives affil-num=9 en-affil= kn-affil=Department of Applied Bioscience, Graduate School of Agriculture, Kyoto University affil-num=10 en-affil= kn-affil=Department of Biofunctional Chemistry, Graduate School of Natural Science and Technology, Okayama University en-keyword=pyrrole polyamide kn-keyword=pyrrole polyamide en-keyword=lipid kn-keyword=lipid en-keyword=phospholipid kn-keyword=phospholipid en-keyword=cancer cell kn-keyword=cancer cell en-keyword=human immunodeficiency virus (HIV)-II kn-keyword=human immunodeficiency virus (HIV)-II END start-ver=1.4 cd-journal=joma no-vol=71 cd-vols= no-issue=3 article-no= start-page=826 end-page=829 dt-received= dt-revised= dt-accepted= dt-pub-year=2007 dt-pub=200703 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Glucosylation of Sucrose Laurate with Cyclodextrin Glucanotransferase en-subtitle= kn-subtitle= en-abstract= kn-abstract=Sucrose monolauroyl esters were found to serve as substrates for cyclodextrin glucanotransferase (CGTase)-catalyzed transglucosidation reactions, affording new sucrose esters that have an additional 1-3 glucose residues on the pyranose ring of the sucrose moiety in the ester. en-copyright= kn-copyright= en-aut-name=OkadaKatsuhide en-aut-sei=Okada en-aut-mei=Katsuhide kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=ZhaoHaisuo en-aut-sei=Zhao en-aut-mei=Haisuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=IzumiMinoru en-aut-sei=Izumi en-aut-mei=Minoru kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=NakajimaShuhei en-aut-sei=Nakajima en-aut-mei=Shuhei kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=BabaNaomichi en-aut-sei=Baba en-aut-mei=Naomichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Research & Development Center, Hayashibara Biochemical Laboratories, Inc. affil-num=2 en-affil= kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology, Okayama University affil-num=3 en-affil= kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology, Okayama University affil-num=4 en-affil= kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology, Okayama University affil-num=5 en-affil= kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology, Okayama University en-keyword=cyclodextrin glucanotransferase kn-keyword=cyclodextrin glucanotransferase en-keyword=CGTase kn-keyword=CGTase en-keyword=sucrose monolaurate kn-keyword=sucrose monolaurate en-keyword=surfactant kn-keyword=surfactant END start-ver=1.4 cd-journal=joma no-vol=71 cd-vols= no-issue=4 article-no= start-page=1086 end-page=1089 dt-received= dt-revised= dt-accepted= dt-pub-year=2007 dt-pub=200704 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Three antinematodal diterpenes from Euphorbia kansui en-subtitle= kn-subtitle= en-abstract= kn-abstract=Three compounds, 20-O-acetyl-[3-O-(2'E,4'Z)-deca-dienoyl]-ingenol (1), 20-O-acetyl-[5-O-(2'E,4'Z)-decadienoyl]-ingenol (2) and 3-O-(2'E,4'Z)-decadienoylingenol (3), were isolated from Euphorbia kansui under the bioassay-guided method. Each compound showed the same antinematodal activity against the nematode, Bursaphelenchus xylophilus, at a minimum effective dose (MED) of 5 mu g/cotton ball. en-copyright= kn-copyright= en-aut-name=ShiJian-Xiao en-aut-sei=Shi en-aut-mei=Jian-Xiao kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=LiZhi-Xuan en-aut-sei=Li en-aut-mei=Zhi-Xuan kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=NitodaTeruhiko en-aut-sei=Nitoda en-aut-mei=Teruhiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=IzumiMinoru en-aut-sei=Izumi en-aut-mei=Minoru kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=KanzakiHiroshi en-aut-sei=Kanzaki en-aut-mei=Hiroshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=BabaNaomichi en-aut-sei=Baba en-aut-mei=Naomichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=KawazuKazuyoshi en-aut-sei=Kawazu en-aut-mei=Kazuyoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=NakajimaShuhei en-aut-sei=Nakajima en-aut-mei=Shuhei kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= affil-num=1 en-affil= kn-affil=College of Life Science, Northwest University affil-num=2 en-affil= kn-affil=College of Life Science, Northwest University affil-num=3 en-affil= kn-affil=The Graduate School of Natural Science and Technology, Department of Biofunctional Chemistry, Laboratory of Applied Natural Products Chemistry, Okayama University affil-num=4 en-affil= kn-affil=The Graduate School of Natural Science and Technology, Department of Biofunctional Chemistry, Laboratory of Applied Natural Products Chemistry, Okayama University affil-num=5 en-affil= kn-affil=The Graduate School of Natural Science and Technology, Department of Biofunctional Chemistry, Laboratory of Applied Natural Products Chemistry, Okayama University affil-num=6 en-affil= kn-affil=The Graduate School of Natural Science and Technology, Department of Biofunctional Chemistry, Laboratory of Applied Natural Products Chemistry, Okayama University affil-num=7 en-affil= kn-affil=The Graduate School of Natural Science and Technology, Department of Biofunctional Chemistry, Laboratory of Applied Natural Products Chemistry, Okayama University affil-num=8 en-affil= kn-affil=The Graduate School of Natural Science and Technology, Department of Biofunctional Chemistry, Laboratory of Applied Natural Products Chemistry, Okayama University en-keyword=antinematodal activity kn-keyword=antinematodal activity en-keyword=Bursaphelenchus xylophilus kn-keyword=Bursaphelenchus xylophilus en-keyword=diterpenoid kn-keyword=diterpenoid en-keyword=ingenane kn-keyword=ingenane en-keyword=Euphorbia kansui kn-keyword=Euphorbia kansui END start-ver=1.4 cd-journal=joma no-vol=85 cd-vols= no-issue=1 article-no= start-page=134 end-page=142 dt-received= dt-revised= dt-accepted= dt-pub-year=2021 dt-pub=20210121 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Synthesis of (12R,13S)-pyriculariol and (12R,13S)-dihydropyriculariol revealed that the rice blast fungus, Pyricularia oryzae, produces these phytotoxins as racemates en-subtitle= kn-subtitle= en-abstract= kn-abstract=Synthesis of assumed natural (12R,13S)-enantiomers of pyriculariol (1) and dihydropyriculariol (2), phytotoxins isolated from rice blast disease fungus, Pyricularia oryzae, was achieved using Wittig reaction or microwave-assisted Stille coupling reaction as the key step. The synthesis revealed that the natural 1 and 2 are racemates. Foliar application test on a rice leaf indicated that both the salicylaldehyde core and side chain were necessary for phytotoxic activity. The fungus is found to produce optically active phytotoxins when incubated with rotary shaker, but racemic ones when cultured using an aerated jar fermenter. en-copyright= kn-copyright= en-aut-name=NagashimaYuta en-aut-sei=Nagashima en-aut-mei=Yuta kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=SasakiAyaka en-aut-sei=Sasaki en-aut-mei=Ayaka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=HiraokaRyoya en-aut-sei=Hiraoka en-aut-mei=Ryoya kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=OnodaYuko en-aut-sei=Onoda en-aut-mei=Yuko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=TanakaKoji en-aut-sei=Tanaka en-aut-mei=Koji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=WangZi-Yi en-aut-sei=Wang en-aut-mei=Zi-Yi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=KuwanaAtsuki en-aut-sei=Kuwana en-aut-mei=Atsuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=SatoYuki en-aut-sei=Sato en-aut-mei=Yuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= en-aut-name=SuzukiYuji en-aut-sei=Suzuki en-aut-mei=Yuji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=9 ORCID= en-aut-name=IzumiMinoru en-aut-sei=Izumi en-aut-mei=Minoru kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=10 ORCID= en-aut-name=KuwaharaShigefumi en-aut-sei=Kuwahara en-aut-mei=Shigefumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=11 ORCID= en-aut-name=NukinaManabu en-aut-sei=Nukina en-aut-mei=Manabu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=12 ORCID= en-aut-name=KiyotaHiromasa en-aut-sei=Kiyota en-aut-mei=Hiromasa kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=13 ORCID= affil-num=1 en-affil=Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University kn-affil= affil-num=2 en-affil=Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University kn-affil= affil-num=3 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=4 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=5 en-affil=Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University kn-affil= affil-num=6 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=7 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=8 en-affil=Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University kn-affil= affil-num=9 en-affil=Laboratory of Plant Nutrition and Function, Graduate School of Agricultural Science, Tohoku University kn-affil= affil-num=10 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=11 en-affil=Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University kn-affil= affil-num=12 en-affil=Professor Emeritus, Yamagata University kn-affil= affil-num=13 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= en-keyword=Pyricularia oryzae kn-keyword=Pyricularia oryzae en-keyword=rice blast disease kn-keyword=rice blast disease en-keyword=structure revision kn-keyword=structure revision en-keyword=total synthesis kn-keyword=total synthesis END