CAS: 25739-41-7; 5-Hydroxy-2-(4-Hydroxy-3-Methoxyphenyl)-7-Methoxy-4H-Chromen-4-One

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(-)-5-hydroxy-2-(4-hydroxy-3-methoxy-phenyl)-7-methoxy-chroman-4-one 7,4′-dihydroxy-5,3′-dimethoxyflavone 2-(3,4-Dihydroxy-phenyl)-5,7-dihydroxy-chromen-4-on 2-(4-hydroxy-3-methoxyphenyl)-5,7-dimethoxy-4H-chromen-4-one2-(3,4-dimethoxyphenyl)-5,7-dimethoxy-4H-chromen-4-one 5-acetoxy-2-(4-acetoxy-3-methoxy-phenyl)-7-methoxy-chromen-4-one

📜5,4'-Dihydroxy-7,3'-Dimethoxyflavone-4'-O-β-D-Xylopyranosyl-(2A->1B)-2A-O-β-D-Xylopyranosyl-(2B->1C)-2B-O-β-D-Xylopyranosyl-2C-octadecanoate置于盐酸体系中,用 乙醇,水 用作溶剂,化学反应 0.5H,反应生成毡毛美洲茶素; 4',5-二羟基-3',7-二甲氧基黄酮
参考文献:New Chemical Constituents From Oryza Sativa Straw And Their Algicidal Activities Against Blue-Green Algae
标题:New Chemical Constituents From Oryza Sativa Straw And Their Algicidal Activities Against Blue-Green Algae
摘要:Five New Constituents,5,4'-Dihydroxy-7,3'-Dimethoxyflavone-4'-O-Beta-D-Xylopyranosyl-(2A-> 1B)-2A-O-Beta-D-Xylopyranosyl-(2B-> 1C)-2B-O-Beta-D-Xylopyranosyl-2C-octadecanoate (1),5,4'-Dihydroxy-7,3'-Dimethoxyflavone-4'-O-Alpha-D-Xylopyranosyl(2A-> 1B)-2A-O-Alpha-U-Xyl Opyran Osyl-(2B-> 1C)-2B-O-Alpha-D-Xylopyranosyl-(2C-> 1C)-2C-O-Alpha-D-Xylopyranosy1-2D-octadecanoate (2),Kaempferol-3-O-Alpha-D-Xylopyranosyl-(2A-> 1B)-2A-O-Alpha-D-Xylopyranosyl-(2B-> 1C)-2B-O-Alpha-D-Xylopyranosyl-(2C-> 1D)-2C-O-Alpha-D-Xylopyranosy1-2D-Hexadecanoate (3),Methyl Salicylate-2-O-Alpha-U-Xylopyranosyl-(2A-> 1B)-2A-O-Alpha-D-Xylopyranosyl-(2B-> 1C)-2B-O-Alpha-D-Xylopyranosyl-(2C-> 1D)-2C-O-Alpha-D-Xylopyranosyl-(2D-> 1E)-2C-O-Alpha-D-Xylopyranosyl-(2E-> 1B)-2A-O-Alpha-A-D-Xylopyranosyl-(2F-> 1G) 1G)-2F-O-Alpha-D-Xylopyranosyl-(2G-> 1H)-2G-O-Alpha-D-Xylopyranosyl-2H-Geranilan-8',10'-Dioic Acid-1'-Oate (4),And Oleioyl-Beta-D-Arabinoside (5),Along With Eight Known Compounds,Were Isolated From A Methanol Extract Of Oryza Sativa Straw. The Structures Of The New Compounds Were Elucidated Using One-And Two-Dimensional NMR Spectroscopies In Combination With Ir,Esi/ms,And Hr-Esi/ftms. In Bioassays With Blue-Green Algae,The Efficacies Of The Algicidal Activities Of The Five New Compounds (1-5) Were Evaluated At Concentrations Of 1,10,And 100 Mg/l. Compound S Had The Highest Growth Inhibition (92.6 +/-0.3%) For Microcystis Aeruginosa Utex 2388 At A Concentration Of 100 Ppm (Mg/l). Compound 5 Has High Potential For The Ecofriendly Control Of Weeds And Algae Harmful To Water-Logged Rice.
Doi:10.1021/jf402145U