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Novel Triterpenoid Saponins from Mimrrsops elengi

IR@IICB: CSIR-Indian Institute of Chemical Biology, Kolkata

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Title Novel Triterpenoid Saponins from Mimrrsops elengi
Creator Sahu, Niranjan P
Koikeb, Kazuo
Jia, Zhonghua
Nikaidob, Tamotsu
Subject Chemistry
Description ---Two novel triterpenoid saponins, mimusopin { 3-O-P-D-glucopyranosyl-2B, 3p, 6p, 23-tetrahydroxyolean- Izen-2%oic acid 28-O-a-L-rhamnopysyl-(l~3)-~-D-xyl~~~sy~-(l~)[a-L-~~anosyl-(l~ 3)1-a-L-rhamnopyranoyl-(1~2)a-L-arabinop~i&)(l) and mimusopsin (3-o-[B-D-glucopyranosyl-(1~33>B-Dgluco- pyranosyll-2p, 3p, 6p. 23-teuahydroxyolean-12-ew28-oic acid 28-O-a-L-rhamnopyranosyl-(l-t3)-B-Dxylopyranosyl-( 1~4)-a-L-rhamnopyranosyl-(l~2)-a-L-~abin~yranosi~}(2) were isolated from the seeds of Mimu~ops elengi. Their structures were elucidated by a combination of 2D-NMR (COSY, HOHAHA, HETCOR, HMBC and NOESY), FAB-MS/MS and suategic chemical degradation. In addition, molecular mechanics and dynamics studies showed that the lack of a 13C glycosylation shift at the Cd of the inner rhamnose. in 1 could be correlated with distortion in the corresponding torsion angles.
Publisher Elsevier
Date 1999
Type Article
Format application/pdf
Identifier http://www.eprints.iicb.res.in/915/1/TETRAHEDRON__51_(48)13435%2D13446;1995[8].pdf
Sahu, Niranjan P and Koikeb, Kazuo and Jia, Zhonghua and Nikaidob, Tamotsu (1999) Novel Triterpenoid Saponins from Mimrrsops elengi. Tetrahedron, 51 (48). pp. 13435-13446.
Relation http://dx.doi.org/10.1016/0040-4020(95)00879-D