Rezanka Tomás, Jáchymová Jitka, Dembitsky Valery M
Institute of Microbiology, Vídenská 1083, Prague 14220, Czech Republic.
Phytochemistry. 2003 Feb;62(4):607-12. doi: 10.1016/s0031-9422(02)00539-3.
Two new compounds isolated from an extract of a Central Asian lichen [Umbilicaria proboscidea (L.) Schrader=Syn.: Gyrophora proboscidea (L.) Ach.] are glucosides with mono- and di-prenylated xanthones as the aglycones and a saccharide moiety from two glucoses linked at C-7. The structures were elucidated on the basis of extensive spectroscopic analysis (1D and 2D NMR, MS, IR and UV) and by hydrolysis.
从一种中亚地衣[长喙脐衣（L.）施拉德=同义词：长喙卷叶地衣（L.）阿奇]提取物中分离出的两种新化合物是糖苷，其苷元为单和二异戊烯基化的呫吨酮，糖部分由两个在C-7处相连的葡萄糖组成。结构是基于广泛的光谱分析（一维和二维核磁共振、质谱、红外和紫外）以及水解作用确定的。
