RESUMO
OBJECTIVE: To study the chemical constituents of Pharbitis purpurea. METHODS: The constituents were isolated by silica gel column chromatography, HPLC and recrystallization and their structures were elucidated on the basis of spectral analysis. RESULTS: Fourteen compounds were isolated and identified as daucosterol (1), umbelliferone (2), ursolic acid (3), N-p-hydroxy-cis-coumaroyltyramine (4), N-p-hydroxy-trans-coumaroyltyramine (5), N-cis-feruloyltyramine (6), N-trans-feruloyltyramine (7), (3R, 5R, 6S, 7E, 9S)-megastigman-5,6-epoxy-7-ene-3,9-diol (8), (6S,9R)-vomifoliol (9), (+)-syringaresinol (10), isovitexin (11), syringopicroside( 12), uricil (13), (6S,9R)-roseoside (14). CONCLUSION: Compounds 3, 8-2,14 are isolated from the genus for the first time.
Assuntos
Apigenina/isolamento & purificação , Butanóis/isolamento & purificação , Convolvulaceae/química , Cicloexanonas/isolamento & purificação , Triterpenos/isolamento & purificação , Apigenina/química , Butanóis/química , Cicloexanonas/química , Glicosídeos/química , Glicosídeos/isolamento & purificação , Estrutura Molecular , Plantas Medicinais/química , Sitosteroides/química , Sitosteroides/isolamento & purificação , Triterpenos/química , Ácido UrsólicoRESUMO
OBJECTIVE: To study the chemical constituents in Astragalus dahuricus. METHOD: The compounds were isolated and purified by column chromatography on silica gel and HPLC, and their structures were elucidated by their spectroscopic evidences. RESULT: Six compounds were identified as: 7, 2'-dihydroxy-3', 4'-dimethoxyisoflavan (1), 2'-hydroxy-3', 4'-dimethoxyisoflavan-7-O-beta-D-glucopyranoside (2), 8, 2'-dihydroxy-7, 4'-dimethoxyisoflavan (3), 7-hydroxy-4'-methoxyisoflavone (4), 7, 3'-dihydroxy-4'-metho-xyisoflavone (5), 9, 10-dimethoxypterocarpan-3-O-beta-D-glucopyranoside (6). CONCLUSION: Compounds 1-6 were obtained from this plant for the first time.