Structure and bioactivity of steroidal saponins isolated from the roots of Chamaelirium luteum (false unicorn).
Basic Information
ID: ALA2086280
Journal: J Nat Prod
Title: Structure and bioactivity of steroidal saponins isolated from the roots of Chamaelirium luteum (false unicorn).
Authors: Challinor VL, Stuthe JM, Parsons PG, Lambert LK, Lehmann RP, Kitching W, De Voss JJ.
Abstract: Phytochemical investigation of Chamaelirium luteum ("false unicorn") resulted in the isolation of 15 steroidal glycosides. Twelve of these (1, 2, 4-9, 11-13, and 15) are apparently unique to this species, and eight of these (6-9, 11-13, and 15) are previously unreported compounds; one (15) possesses a new steroidal aglycone. In addition, the absolute configuration of (23R,24S)-chiograsterol A (10) was defined, and its full spectroscopic characterization is reported for the first time. The structures and configurations of the saponins were determined using a combination of multistage mass spectrometry (MS(n)), 1D and 2D NMR experiments, and chemical degradation. The antiproliferative activity of nine compounds obtained in the present work, and eight related compounds generated in previous work, was compared in six human tumor cell lines, with aglycones 3 and 10 and related derivatives 16, 17, 19, and 20 all displaying significant antiproliferative activity.
CiteXplore: 22880631
DOI: 10.1021/np300393y
Patent ID: ┄