Biflavonoids from Cycas beddomei DAS Biswanath MAHENDER Gurram RAO Yerra KOTESWARA PRABHAKAR Anabathula JAGADEESH Bharatam 公益社団法人日本薬学会 Chemical & pharmaceutical bulletin 00092363 53 1 135 136 2005-01-01 Chemical investigation on the constituents of the cones of Cycas beddomei has resulted in the isolation of a new biflavonoid, 2,3-dihydro-4‴-O-methyl amentoflavone, along with 2,3,2",3"-tetrahydro hinokiflavone, 2,3,2",3"-tetrahydro amentoflavone, 2,3-dihydro amentoflavone. The last two compounds were not reported earlier from this plant. The structure of the new compound was established by detailed analysis of its spectral (mainly 1D and 2D NMR) data. 2005-01-01 10016651857 AA00602100 ENG CJP CJPref NII-ELS J-STAGE 3 6 1 Biflavonoids from Cycas beddomei DAS Biswanath MAHENDER Gurram RAO Yerra KOTESWARA PRABHAKAR Anabathula JAGADEESH Bharatam The Pharmaceutical Society of Japan Chemical & pharmaceutical bulletin Chemical investigation on the constituents of the cones of Cycas beddomei has resulted in the isolation of a new biflavonoid, 2,3-dihydro-4‴-O-methyl amentoflavone, along with 2,3,2",3"-tetrahydro hinokiflavone, 2,3,2",3"-tetrahydro amentoflavone, 2,3-dihydro amentoflavone. The last two compounds were not reported earlier from this plant. The structure of the new compound was established by detailed analysis of its spectral (mainly 1D and 2D NMR) data. DAS Biswanath Organic Chemistry Division I, Indian Institute of Chemical Technology MAHENDER Gurram Organic Chemistry Division I, Indian Institute of Chemical Technology RAO Yerra KOTESWARA Organic Chemistry Division I, Indian Institute of Chemical Technology PRABHAKAR Anabathula Organic Chemistry Division I, Indian Institute of Chemical Technology JAGADEESH Bharatam Organic Chemistry Division I, Indian Institute of Chemical Technology