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摘要
A new Allelochemical I m. p. 211-212 degrees C;m.f. C33H40O19, [M](+) 740 (FABMS), alongwith two known compounds 5-hydroxy-3,7,4'-trimethoxy flavone II and 7, 3'-dihydroxy- 5, 4', 5'-trimethoxy isoflavone III have been isolated from methanolic extract of the flowers of Doronicum hookeri. The structure of new compound I was characterized as 5, 7,4'-trihydroxy-6-methoxy-flavone-5-O-alpha-L-rhamno-pyranosyl-1 -> 4)-O-alpha-L-arabinopyranosyl-4'-O-beta-D-glucopyranoside by various chemical degradations, spectral analysis and color reactions.
- 出版日期2013-6
