Novel tetranortriterpenoid derivatives from Munronia henryi

Autor: Li Chen, Xiao-Dong Luo, Da-Gang Wu, Shu-Hua Qi, Yun-Bao Ma
Rok vydání: 2003
Předmět:
Zdroj: Tetrahedron. 59:4193-4199
ISSN: 0040-4020
DOI: 10.1016/s0040-4020(03)00573-8
Popis: Six novel tetranortriterpenoid derivatives were isolated from the methanolic extract of the whole bodies of Munronia henryi, namely, munronins A-F (1-6). In compounds (3-6), the side chains are rare in tetranortriterpenoids. Their structures were established by extensive NMR experiments. Based on the diversity of the side chains, possible biodegradations for the side chains of compounds 1-6 from euphane or tirucallane skeleton are proposed. Munronins A-E exhibited moderate antifeeding activity against Pieris brassicae L, while munronin F showed negative activity. (C) 2003 Elsevier Science Ltd. All rights reserved.
Databáze: OpenAIRE