title: Study on the Alkaloids of Melodinus tenuicaudatus.
abstract: Fourteen alkaloids were isolated from the stem bark of MELODINUS TENUICAUDATUS Tsiang et P. T. Li. Eleven of them were identified as known alkaloids, namely, scandine ( 2), Delta (14)-eburnamine ( 4), vindolinine N(b)-oxide ( 5), 11-methoxytabersonine ( 6), vindolinine ( 7), EPI-vindolinine N(b)-oxide ( 8), hazuntine ( 9), compactinervine ( 10), 11-hydroxytabersonine ( 11), Delta (14)-vincine ( 12), and normacusine B ( 14). Two alkaloids were new: 10-hydroxyscandine ( 1), and the dimer, tenuicausine ( 3); their structures were elucidated by spectroscopic and chemical methods. One alkaloid ( 13) occurring in trace amounts, could not be identified.
authors.affiliation: Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 319 Yue-yang Road, Shanghai 200031, Peoples' Republic of China.
authors.forename: Y L
authors.initials: YL
authors.lastname: Zhou
authors.forename: J H
authors.initials: JH
authors.lastname: Ye
authors.forename: Z M
authors.initials: ZM
authors.lastname: Li
authors.forename: Z H
authors.initials: ZH
authors.lastname: Huang