Zheng Qun Xiong, Xu Zhao Jun, Sun Xian Feng, Guéritte Françoise, Cesario Michele, Sun Han Dong, Cheng Christopher H K, Hao Xiao-Jiang, Zhao Yu
Department of Traditional Chinese Medicine and Natural Drug Research, College of Pharmaceutical Sciences, Zhejiang University, and Institute of Hangzhou Commerce, Hangzhou, People's Republic of China.
J Nat Prod. 2003 Aug;66(8):1078-81. doi: 10.1021/np0205856.
Three new eudesmane sesquiterpenes, 5 beta-hydroxyilicic acid (1), 5 alpha-hydroxyl-4-epi-ilicic acid methyl ester (2), and 3 alpha-hydroxyilicic acid (3), together with 12 known sesquiterpenes were isolated from the aerial part of Laggera alata. Their structures were elucidated primarily by NMR and mass spectroscopic methods. The structures of 1 and 2 were confirmed by X-ray crystallography.
从六棱菊地上部分分离得到3个新的桉叶烷倍半萜，5β-羟基异土木香酸（1）、5α-羟基-4-表异土木香酸甲酯（2）和3α-羟基异土木香酸（3），以及12个已知倍半萜。其结构主要通过核磁共振波谱和质谱方法进行鉴定。1和2的结构通过X射线晶体学得以确证。
