Original Articles: 2010 Vol: 2 Issue: 2
Isolation and identification of a new molecule from Curculigo Orchioides (hypoxidaceae)
Abstract
The novel compound 2-β-D-glucopyranosyloxy-5-hydroxybenzyl-2’,6’-dimethoxy- 3’-hydroxybenzoate, a glycoside of substituted benzyl benzoate isolated from C. orchioides. The molecular formula C22H26O12 was deduced from HRFAB-MS m/z 505.1323 [M+Na]+ (required 505.1322 for C22H26O12Na). Assignments of proton and carbon resonances were deduced from analysis of 1H-1H COSY, heteronuclear HMQC, and HMBC 2D chemical shift correlations. The data are supported by 1D and 2D NMR spectra show consistent with a benzyl benzoate structure. The examination of the data suggested the presence of two aromatic rings, of which one ring A, is trisubtituted with three aromatic protons at δ 6.70 (1H, dd, J=8.8Hz and 3.0Hz, H-4), δ 7.08 (1H, d, J=8.8Hz, H-3) and δ 6.92 (1H, d, J=3.0 Hz, H-6). The other aromatic system, ring B, is tetrasubstituted.
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog
blog