Ziming Lu1, Shengjun Dai, Ruoyun Chen, Dequan Yu. 1. Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine (Ministry of Education), Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.
Abstract
OBJECTIVE: To investigate the active constituents of the branches and leaves of Polyalthia nemoralis. METHOD: The compounds were isolated and purified by silica gel, macroporous adsorption resin and Sephadex LH-20 column chromatographic methods. Their chemical structures were elucidated on the basis of physicochemical properties and spectral data. RESULT: Eight compounds were isolated and identified as: zincpolyanemin (1), nickel bis-(pyridine-N-oxide-2-thiolate) (2), cupric bis (pyridine-N-oxide-2-thiolate (3), 2-methanesulfonyl-pyridine (4), 2-pyridinethiolate N-oxide (5), 2,2'-dithiodipyridine (6), 2-thiohydroxypyridin-N-oxide-2-S-beta-D-gluco pyranoside (7) and pyridine-N-oxide (8), respectively. CONCLUSION: Compounds 2, 4-6, 8 were new natural products. The bioassays in vitro against five human tumor cell lines with MTT method showed stronger cytotoxic activities (IC50 0.05-0.09 mg x L(-1)) for compounds 1-3 and 6, and weaker cytotoxic activities (IC50 5.49-7.71 mg x L(-1)) for compound 5.
OBJECTIVE: To investigate the active constituents of the branches and leaves of Polyalthia nemoralis. METHOD: The compounds were isolated and purified by silica gel, macroporous adsorption resin and Sephadex LH-20 column chromatographic methods. Their chemical structures were elucidated on the basis of physicochemical properties and spectral data. RESULT: Eight compounds were isolated and identified as: zincpolyanemin (1), nickel bis-(pyridine-N-oxide-2-thiolate) (2), cupric bis (pyridine-N-oxide-2-thiolate (3), 2-methanesulfonyl-pyridine (4), 2-pyridinethiolate N-oxide (5), 2,2'-dithiodipyridine (6), 2-thiohydroxypyridin-N-oxide-2-S-beta-D-gluco pyranoside (7) and pyridine-N-oxide (8), respectively. CONCLUSION: Compounds 2, 4-6, 8 were new natural products. The bioassays in vitro against five human tumor cell lines with MTT method showed stronger cytotoxic activities (IC50 0.05-0.09 mg x L(-1)) for compounds 1-3 and 6, and weaker cytotoxic activities (IC50 5.49-7.71 mg x L(-1)) for compound 5.
Authors: Bethany G Elkington; Kongmany Sydara; Andrew Newsome; Chang Hwa Hwang; David C Lankin; Charlotte Simmler; José G Napolitano; Richard Ree; James G Graham; Charlotte Gyllenhaal; Somsanith Bouamanivong; Onevilay Souliya; Guido F Pauli; Scott G Franzblau; Djaja Djendoel Soejarto Journal: J Ethnopharmacol Date: 2013-12-11 Impact factor: 4.360