RESUMO
OBJECTIVE: To study the chemical constituents from the herb of Gentianopsis paludosa. METHOD: Column chromatogrophy and spectral analysis were used to isolate and identify the constituents. RESULT: Six compounds were isolated and identified as 1,7-dihydroxy-3,8-dimethoxyxanthone (I), 1-hydroxy-3, 7, 8-trimethoxyxanthone (II), 1, 8-dihydroxy-3, 7-dimethoxyxanthone (III), 1-hydroxy-3, 7-dimethoxyxanthone (IV), beta-sitosterol (V), daucosterol (VI). CONCLUSION: Compounds III-VI were isolated from the plant for the first time.
Assuntos
Gentianaceae/química , Plantas Medicinais/química , Sitosteroides/isolamento & purificação , Xantonas/isolamento & purificação , Sitosteroides/química , Xantonas/químicaRESUMO
Four phytoecdysteroids that have only 19 or 21 carbons, named 11alpha-hydroxyrubrosterone (1), dihydroxyrubrosterone (2), rubrosterone (3) and poststerone (4), were isolated from the whole plant of Cyanotis arachnoidea C.B. Clarke. Among them, 1 was a new compound. Their structures were elucidated by spectroscopic methods.
Assuntos
Commelinaceae , Ecdisteroides/química , Fitoterapia , Extratos Vegetais/química , Humanos , Espectroscopia de Ressonância MagnéticaRESUMO
AIM: To investigate the chemical constituents of Cyanotis arachnoidea. METHODS: By using chromatographic methods for separation and combination with spectral analysis, their chemical structures were determined. RESULTS: Six compounds were identified as ajugasterone C-20, 22-acetonide (1), 20-hydroxyecdysone-20, 22-acetonide (2), 22-oxo-ajugasterone C (3), 22-oxo-20-hydroxyecdysone (4), beta-sitosterol (5), daucosterol (6). CONCLUSION: Compound 3 is a new compound, 4 was a new natural compound.
Assuntos
Commelinaceae/química , Ecdisona/isolamento & purificação , Ecdisterona/isolamento & purificação , Plantas Medicinais/química , Ecdisona/análogos & derivados , Ecdisona/química , Ecdisterona/análogos & derivados , Ecdisterona/química , Estrutura Molecular , Sitosteroides/química , Sitosteroides/isolamento & purificaçãoRESUMO
From Cyanotis arachnoidea C.B. Clarke, a new phytosterone named cyanosterone A (1), along with three known compounds--beta-ecdysone (2), ajugasterone C (3) and beta-sitosterol (4) were isolated. The structure of the new compound was determined as 3beta,14alpha,20R,22R-tetrahydroxy-5alpha-cholest-7-en-6-one on the basis of physicochemical properties and spectral analysis.
