New anthraquinones from Eleutherine americana.
作者:Hajime Komura、Kohsei Mizukawa、Hiroyuki Minakata、Huizhu Huang、Guowei Qin、Rensheng Xu
DOI:10.1248/cpb.31.4206
日期:——
Three minor new anthraquinones were isolated from the bulb of Eleutherine americana Merr. et Heyne. Their structures were elucidated as methyl ethers of 3, 4, 8-trihydroxy-1-methyl-anthra-9, 10-quinone-2-carboxylic acid methyl ester 4-6 by spectral analyses including long-range selective proton decoupling (LSPD) experiments in 13C-NMR.
从 Eleutherine americana Merr. et Heyne 的鳞茎中分离出三种次要的新蒽醌。通过光谱分析,包括 13C-NMR 长程选择性质子解偶联(LSPD)实验,阐明了它们的结构为 3, 4, 8-三羟基-1-甲基-蒽-9, 10-醌-2-羧酸甲酯 4-6 的甲醚。