title: [C21 steroids from the stems of Marsdenia tenacissima].
abstract: To study the C21 steroids of the stems of Marsdenia tenacissima (Roxb.) Wight et Arn, various chromatography methods were used for the isolation of the constituents and their structures were identified by spectral analysis. Eight C21 steroids were isolated from the CHCl3 extract, which were identified as 11alpha-O-tigloyl-17beta-tenacigenin B (1), 17beta-tenacigenin B (2), tenacigenoside A (3), 11alpha-O-2-methylbutyryl-12beta-O-acetyl tenacigenin B (4), tenacissoside H (5), marsdenoside A (6), tenacissoside G (7), and tenacissoside I (8). Among them, compound 1 is a new compound.
authors: School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China.
authors: Yong-Sheng
authors: YS
authors: Lei
authors: Zhan-Lin
authors: ZL
authors: Li
authors: Shen-Shen
authors: SS
authors: Yang
authors: Zhi-Lan
authors: ZL
authors: Liu
authors: Hui-Ming
authors: HM
authors: Hua
mesh_terms: D031101:Marsdenia / Q000737:chemistry*; D015394:Molecular Structure; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D012503:Saponins; D013256:Steroids