title: Seventeen steroids from the pith of Tetrapanax papyriferus.
abstract: Two new steroidal ketones (1, 2), together with 10 known steroids (3-12) and five known steroidal saponins (13-17), have been obtained from the pitch of Tetrapanax papyrierus. The structures of 1 and 2 were elucidated as 3β-hydroxystigmast-8, 22-diene-7,11-dione and 3β-hydroxystigmast-8-ene-7,11-dione by IR, HR-ESI-MS, 1D and 2D NMR techniques. Except for 4, 14, 15, 16, 13 compounds reported in this paper were isolated from Tetrapanax papyriferus for the first time.
authors.affiliation: a Key Laboratory of Standardization of Chinese Medicines, Ministry of Education , Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine , Shanghai 201203 , China.|b Pharmaceutical College , Anhui University of Chinese Medicine , Hefei 230012 , China.
authors.forename: Jing-Lan
authors.initials: JL
authors.lastname: Xu
authors.affiliation: a Key Laboratory of Standardization of Chinese Medicines, Ministry of Education , Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine , Shanghai 201203 , China.
authors.forename: Li-Hua
authors.initials: LH
authors.lastname: Gu
authors.affiliation: a Key Laboratory of Standardization of Chinese Medicines, Ministry of Education , Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine , Shanghai 201203 , China.
authors.forename: Zheng-Tao
authors.initials: ZT
authors.lastname: Wang
authors.affiliation: c Faculty of Science and Technology, Department of Life Sciences , University of Westminster , London , UK.
authors.forename: Annie
authors.initials: A
authors.lastname: Bligh
authors.affiliation: a Key Laboratory of Standardization of Chinese Medicines, Ministry of Education , Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine , Shanghai 201203 , China.
authors.forename: Zhu-Zhen
authors.initials: ZZ
authors.lastname: Han
authors.affiliation: b Pharmaceutical College , Anhui University of Chinese Medicine , Hefei 230012 , China.
authors.forename: Shou-Jin
authors.initials: SJ
authors.lastname: Liu
mesh_terms: D027481:Araliaceae / Q000737:chemistry*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D027343:Rhizome / Q000737:chemistry; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D013237:Stereoisomerism; D013265:Stigmasterol / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D012503:Saponins; D013265:Stigmasterol
keywords: Araliaceae; Tetrapanax papyriferus; pith; steroidal ketone; steroidal saponin