Biotransformation of Isoflavones by the Larvae of the Common Cutworm (Spodoptera litura)
作者:Koji Takahashi、Hideo Araki、Mitsuo Miyazawa
DOI:10.1248/cpb.54.719
日期:——
Biotransformation of the 5,7,4′-trimethoxyisoflavone (1), 6,7,4′-trimethoxyisoflavone (2), and 7,4′-dimethoxyisoflavone (3) by insects, Spodoptera litura was investigated. Compound 1 was transformed to 5-hydroxy-7,4′-dimethoxyisoflavone (4), 7-hydroxy-5,4′-dimethoxyisoflavone (5) and 4′-hydroxy-5,7-dimethoxyisoflavone (6) by S. litura. Compounds 2 and 3 were hardly metabolized by S. litura. This suggested that compound 1 was converted to compounds 4, 5 and 6 by demethylation at the C-5, C-7 and C-4′ position, respectively.
研究了昆虫 Spodoptera litura 对 5,7,4′-三甲氧基异黄酮(1)、6,7,4′-三甲氧基异黄酮(2)和 7,4′-二甲氧基异黄酮(3)的生物转化。化合物 1 在鞘翅目昆虫体内转化为 5-羟基-7,4′-二甲氧基异黄酮(4)、7-羟基-5,4′-二甲氧基异黄酮(5)和 4′-羟基-5,7-二甲氧基异黄酮(6)。化合物 2 和 3 几乎不被 S. litura 代谢。这表明化合物 1 分别通过 C-5、C-7 和 C-4′ 位的脱甲基作用转化为化合物 4、5 和 6。