4 резултати
Rosa nutkana Presl. (Rosaceae) is distributed abundantly throughout central and southern areas of British Columbia, Canada. Aboriginal people in the Pacific Northwest have traditionally used R. nutkana as a food, medicine, and source of cultural material. The methanolic extract of the fruits of R.
OBJECTIVE
To investigate the chemical constituents from the fruit of Rosa bella and its bioactivity.
METHODS
The compounds were isolated from the methanol extract by column chromatography, then identified by 1H, 13C NMR and by comparison with authentic samples. The unorganized hoptoad heart was used
Six compounds were isolated from Rosa laevigata. Five of them were obtained from the ethanolic extract and identified as 2 alpha, 3 beta, 19 alpha, 23-tetrahydroxyurs-12-en-28-oic acid, 2 alpha, 3 alpha, 19 alpha, 23-tetrahydroxyurs-12-en-28-oic acid, euscaphic acid, beta-sitosterol and daucosterol.
The constituents in 95% ethanol extract of the root of Rosa cymosa Tratt were purified by column chromatography techniques, leading to isolation of eleven triterpenes. Their structures were elucidated by spectroscopic data as pomolic acid (1), fupenzic acid (2), ursolic acid (3), euscaphic acid (4),