title: Two new Daphniphyllum alkaloids from the stems and leaves of Daphniphyllum calycinum.
abstract: Two new Daphniphyllum alkaloids, 9,10-epoxycalycinine A (1) and homodaphniphyllate (2), together with eight known related alkaloids, were isolated from the stems and leaves of Daphniphyllum calycinum. The structures of the new compounds 1 and 2 were elucidated on the basis of in-depth spectroscopic-data analysis, by chemical derivatization, and by comparison of their spectroscopic data with those of known compounds.
authors.affiliation: State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zu Chong Zhi Rd. 555, Shanghai 201203, P. R. China.
authors.forename: Zhen-Yu
authors.initials: ZY
authors.lastname: Li
authors.forename: Shu-Ying
authors.initials: SY
authors.lastname: Peng
authors.forename: Li
authors.initials: L
authors.lastname: Fang
authors.forename: Yi-Ming
authors.initials: YM
authors.lastname: Yang
authors.forename: Yue-Wei
authors.initials: YW
authors.lastname: Guo
mesh_terms: D000470:Alkaloids / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D019684:Magnoliopsida / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry
chemical_list: C539331:9,10-epoxycalycinine A; D000470:Alkaloids; C539332:homodaphniphyllate