The ethanolic extract of the root bark of Melia azedarach exhibited cytotoxic activity against lymphocytic leukemia P388 cell lines in vitro. Systematic fractionation of the extract monitored by cytotoxic bioassay led to the isolation of two new azadirachtin-type limonoids, 1-tigloyl-3-acetyl-11-methoxymeliacarpinin (1) and 1-acetyl-3-tigloyl-11-methoxymeliacarpinin (2), together with three highly
The Structures of Azedarachins, Limonoid Antifeedants from Chinese<i>Melia azedarach</i>Linn
作者:Ruo Chun Huang、Hiroaki Okamura、Tetsuo Iwagawa、Munehiro Nakatani
DOI:10.1246/bcsj.67.2468
日期:1994.9
Three azedarachins, insect antifeedant limonoids, have been isolated from the root bark of Chinese Melia azedarach Linn (Meliaceae), along with six trichilins. Their structures show a 14,15-epoxide and a 19/29 acyl acetal bridge system, as elucidated by spectroscopic studies. They are antifeedants active against the larvae of Spodoptera exigua Hubner (Boisduval).