title: A new naturally acetylated triterpene saponin from Nigella sativa.
abstract: A new glycosylated triterpene 1 was identified as 3-O-[beta-D-xylopyranosyl-(1-->3)-alpha-l-rhamnopyranosyl-(1-->4)-beta-D-glucopyranosyl]-11-methoxy-16-hydroxy-17-acetoxy hederagenin from an ethanolic extract of seeds of Nigella sativa Linn. Identification of the naturally acetylated saponin was based on chemical and spectroscopic analyses including FABMS, (1)H, (13)C, and 2D NMR and DEPT. The saponin was a penta hydroxy pentacyclic triterpene, in which one hydroxyl group was acetylated and other one was methylated naturally.
authors.affiliation: School of Studies in Chemistry and Biochemistry, Vikram University, Ujjain 456 010, M.P., India. bkmehta11@yahoo.com
authors.forename: Bhupendra Kumar
authors.initials: BK
authors.lastname: Mehta
authors.forename: Prabha
authors.initials: P
authors.lastname: Mehta
authors.forename: Meenal
authors.initials: M
authors.lastname: Gupta
mesh_terms: D000107:Acetylation; D000431:Ethanol / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D031881:Nigella sativa / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry*
chemical_list: D010936:Plant Extracts; D012503:Saponins; D014315:Triterpenes; D000431:Ethanol