title: 5-methoxyaristololactam I, the first natural 5-substituted aristololactam from Asarum ichangense.
abstract: A new aristololactam, 5-methoxyaristololactam I (1), was isolated from an ethanol extract of the whole plant of Asarum ichangense C. Y. Cheng et C. S. Yang, together with twenty known compounds (2-21). The structure of 1 was elucidated by spectroscopic methods. Compounds 11, 13, 17, and 19 were isolated from Aristolochiaceae for the first time. Compounds 2, 14, and 15 are considered as common constituents of the genus Asarum.
authors.affiliation: State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, PR China.
authors.forename: Bai-Bo
authors.initials: BB
authors.lastname: Xie
authors.forename: Ming-Ying
authors.initials: MY
authors.lastname: Shang
authors.forename: Kuo-Hsiung
authors.initials: KH
authors.lastname: Lee
authors.forename: Xuan
authors.initials: X
authors.lastname: Wang
authors.forename: Katsuko
authors.initials: K
authors.lastname: Komatsu
authors.forename: Shao-Qing
authors.initials: SQ
authors.lastname: Cai
mesh_terms: D029065:Aristolochiaceae / Q000737:chemistry; D030023:Asarum / Q000737:chemistry*; D001688:Biological Products / Q000737:chemistry / Q000302:isolation & purification*; D007769:Lactams / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy
chemical_list: C556726:5-methoxyaristololactam I; D001688:Biological Products; D007769:Lactams