Object To study the chemical constituents of alkaloids of Amsonia sinensis Tsiang extracted with methanol. Methods Compounds were separated by exchange resin, macroporous resin and silica gel column chromatography. Their structures were elucidated by spectroscopic analysis. Results Three compounds were isolated from total alkaloids of A. sinensis extracted with methanol. They were identified as: rhazidigenine (Ⅰ), amsonic acid (Ⅱ), trans-sinapic acid methylester (Ⅲ). Conclusion Compound Ⅱ is a new one, and compound Ⅰ and Ⅲ are obtained from this plant for the first time.

Object A systematic study on the chemical constituents of Incarvillea arguta (Royle) Royle was carried out Methods The constituents were isolated on silica gel column chromatography, preparative TLC and Sephadex LH 20 column chromatography, identified by physicochemical properties and the sturctures were elucidated by spectral analysis (MS, 1HNMR, 13 CNMR) Results Three compounds were identified as argutine A (Ⅰ), argutine B (Ⅱ) and boschniakinic acid (Ⅲ) Conclusion Compound Ⅰ and Ⅱ are new monoterpene alkaloids, and compound Ⅲ is isolated from Incarrillea A Juss plants for the first time

From the total alkaloids of the root of Kopsia lainanensis Tsiang, eight compounds were isolatcd and identificd as coronaridine (Ⅰ), heyneaninc (Ⅱ), tabersonine (Ⅲ), 11-methoxytabersonine (Ⅳ), scandine (Ⅴ), N-methoxycarbonyl-11, 12-methylenedioxykopsinaline (Ⅵ), kopsinine (Ⅶ) and N-methoxycarbonyl-12-methoxykopsinaline (Ⅷ) by means of physical constants and spectral analysis