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Two New Alkaloids from Stemona tuberosa
Author(s) -
Zhong Ying,
Gao Ying,
Guo QiuPing,
Li WeiMin
Publication year - 2010
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.200900134
Subject(s) - chemistry , electrospray ionization , fragmentation (computing) , chromatography , mass spectrometry , high performance liquid chromatography , electrospray , stereochemistry , computer science , operating system
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 1D‐ and 2D‐NMR experiments. The four alkaloids 1 – 4 were analyzed by on‐line high‐performance liquid chromatography/electrospray‐ionization mass spectrometry (HPLC/ESI‐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.