Biomedical subjects
Publications and source records attributed to R X Tan.
The aerial parts of ARTEMISIA FEDDEI Lévl. et Vant., common in the NW of China, contain several widespread plant constituents and five sesquiterpene lactones two of which are new guaianolides. The structures were elucidated by spectroscopic methods.
The aerial parts of ARTEMISIA DRACUNCULUS afforded several known compounds as well as three new acetylenes, two phenylpropane derivatives, two monoterpenes, hex-3 Z-en-1-ol and vomifoliol A glucosides. The structures were elucidated by spectroscopic methods and a few chemical transformations.
The polar parts of the title plant gave several lignans including six new ones named vladinol A-F. The structures were elucidated by high field (1)H-NMR spectroscopy and a few chemical reactions. The stereochemistry was determined by the observed NOE's and by comparison of the (1)H-NMR data with those of related lignans.
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