[A new sesquiterpene from stems of Buddleja lindleyana].

The present study investigated the chemical constituents from the stems of Buddleja lindleyana. Ten compounds were isolated from the 95% EtOH extract of B. lindleyana stems by means of some techniques including polyamide, silica gel, MCI, Sephadex LH-20 column chromatography, and semi-preparative high-performance liquid chromatography(HPLC).

Five new alkaloids from the stems of .

Five new alkaloids and five known alkaloids were isolated from a 95% ethanol extract of the stems of L. Their chemical structures were elucidated by UV, IR, HRESIMS, NMR and X-ray. Furthermore, the analgesic activities of alkaloids , and were evaluated by using an acetic acid-induced writhing test in mice, and their writhing inhibition rates were 67.

[Erythrina alkaloids from stems of Erythrina corallodendron].

This study aims to investigate Erythrina alkaloids from the stems of Erythrina corallodendron. Eighteen Erythrina alkaloids were isolated from the 95% ethanol extract of the stems of E. corallodendron by silica gel,octadecyl silica( ODS),Sephadex LH-20 column chromatography and preparative HPLC.