Two new cucurbitane triterpenoids from the seeds of Momordica charantia

Two new cucurbitane triterpenoids 1 and 2 were isolated, together with six known compounds, from the seeds of Momordica charantia L. The structures of new compounds were determined to be 3- O -{[β- d -galactopyranosyl(1 → 6)]- O -β- d -galactopyranosyl}-23(R), 24(R), 25-trihydroxycucur-bit-5-ene (1)...

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Bibliographic Details
Published in:Journal of asian natural products research 2014-05, Vol.16 (5), p.476-482
Main Authors: Ma, Lin, Yu, Ai-Hua, Sun, Li-Li, Gao, Wan, Zhang, Meng-Meng, Su, Ya-Lun, Liu, Hua, Ji, Teng-Fei, Li, Di-Zao
Format: Article
Language:English
Subjects:
chemical reactions
Cucurbitaceae
cucurbitane triterpenoids
Fruit - chemistry
Glycosides - chemistry
Glycosides - isolation & purification
mass spectrometry
Molecular Structure
Momordica charantia
Momordica charantia - chemistry
nuclear magnetic resonance spectroscopy
Nuclear Magnetic Resonance, Biomolecular
seeds
Seeds - chemistry
Stereoisomerism
Triterpenes - chemistry
Triterpenes - isolation & purification
triterpenoids
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Summary:Two new cucurbitane triterpenoids 1 and 2 were isolated, together with six known compounds, from the seeds of Momordica charantia L. The structures of new compounds were determined to be 3- O -{[β- d -galactopyranosyl(1 → 6)]- O -β- d -galactopyranosyl}-23(R), 24(R), 25-trihydroxycucur-bit-5-ene (1), 3- O -[β- d -galactopyranosyl]-25- O -β- d -galactopyranosyl-7(R), 22(S), 23(R), 24(R), 25-pentahydroxycucurbit-5-ene (2), respectively. Their structures were elucidated by the combination of mass spectrometry, one- and two-dimensional NMR experiments and chemical reactions.
ISSN:1477-2213
1028-6020
1477-2213
DOI:10.1080/10286020.2014.914502