| Literature DB >> 10757734 |
C M Hasan1, S Khan, A Jabbar, M A Rashid.
Abstract
An ethanolic extract of the roots of Barringtonia racemosa afforded two novel neo-clerodane-type diterpenoids, methyl-15, 16-epoxy-12-oxo-3,13(16),14-neo-clerodatrien-18, 19-olide-17-carboxylate (nasimalun A, 1) and dimethyl-15,16-epoxy-3, 13(16),14-neo-clerodatrien-17,18-dicarboxylate (17-carboxymethylhardwickiic acid methyl ester, nasimalun B, 2) by NMR and MS analyses and by comparison of their spectral data with related compunds. The relative stereochemistry of the asymmetric centers in 1 and 2 was determined by selective 1D NOESY experiments.Entities:
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Year: 2000 PMID： 10757734 DOI： 10.1021/np990488l
Source DB: PubMed Journal: J Nat Prod ISSN： 0163-3864 Impact factor: 4.050