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Two New Alkaloids from Stemona tuberosa

โœ Scribed by Ying Zhong; Ying Gao; Qiu-Ping Guo; Wei-Min Li

Publisher
John Wiley and Sons
Year
2010
Tongue
German
Weight
172 KB
Volume
93
Category
Article
ISSN
0018-019X

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โœฆ Synopsis

Abstract

Two new alkaloids, named tuberostemoninol A (1) and tuberostemoninol B (2), along with the known compounds tuberostemoninol (3) and bisdehydroneotuberostemonine (4), were isolated from Stemona tuberosa Lour. The structures were elucidated by means of spectroscopic analyses, including 1Dโ€ and 2Dโ€NMR experiments. The four alkaloids 1โ€“4 were analyzed by onโ€line highโ€performance liquid chromatography/electrosprayโ€ionization mass spectrometry (HPLC/ESIโ€MS), and their fragmentation pathways were found to be similar. Compounds 1, 2, and 3 are isomers with the same molecular mass but which eluted at different retention times.

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