title: Complete assignments of 1H and 13C NMR spectroscopic data for three new stigmastane glycosides from Vernonia cumingiana.
abstract: Three new steroidal saponins, Vernoniosides S1 (1), Vernoniosides S2 (2) and Vernoniosides S3 (3) were isolated from the stem of Vernonia cumingian. Their chemical structures were elucidated on the basis of MS, NMR spectroscopic and chemical analysis. Complete assignment of (1)H and (13)C NMR spectroscopic data were achieved by 1D and 2D NMR experiments (HMQC, HMBC, ROESY).
authors.affiliation: Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100094, China. suomaorong@163.com
authors.forename: Maorong
authors.initials: M
authors.lastname: Suo
authors.forename: Junshan
authors.initials: J
authors.lastname: Yang
mesh_terms: D002247:Carbon Isotopes; D002776:Cholestanes / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods
chemical_list: D002247:Carbon Isotopes; D002776:Cholestanes; D006027:Glycosides