Cucurbitacin glycosides from Caput nigri.
The chemical structures of cabenosides I-L were investigated. These are four of the 12 cucurbitacin glycosides isolated from 'Cabeça-de-negro', the roots of Caput nigri. By means of chemical analyses the structures of cabenosides I-L were elucidated as 10 alpha-cucurbit-5-ene-3 beta,11 alpha,20S,24 xi,25-pentaol [3, 25-di-O-beta-D-glucopyranoside, and 3-O-beta-D-glucopyranosyl-(1-2)-beta-D-glucopyranosyl (sophorosyl), 25-O-beta-D-glucopyranoside], and 10 alpha-cucurbit-5,20,24-triene-11-oxo-3 beta,26-diol [3-O-beta-D-glucopyranosyl-(1-6)-beta-D-glucopyranosyl (gentiobiosyl), 26-O-beta-D-glucopyranoside and 3,26-di-O-gentiobioside], respectively.
Nakano
K
K
Faculty of Pharmaceutical Sciences, Tokushima University, Japan.
Kanai
Y
Y
Murakami
K
K
Takaishi
Y
Y
D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D016339:Spectrometry, Mass, Fast Atom Bombardment
D006027:Glycosides