3 resultados
Citreorosein was isolated from P. cuspidatum as a new oestrogenic compound, together with emodin and its glucoside, by silica gel column chromatography and preparative high-performance liquid chromatography sequentially. Oestrogenic activity was determined by a recombinant yeast assay.
Four anthraquinones, physcion (1), emodin (2), citreorosein (3) and anthraglycoside B (6), and two stilbenes, resveratrol (4), and piceid (5), were isolated previously from the root of Polygonum cuspidatum. These bioactive compounds were examined for their antityrosinase potency. No antityrosinase
Three anthraquinones (1, 2 and 4), three stilbenes (5, 6 and 7) and 3,5-dihydroxybenzyl alcohol (3) were isolated from Reynoutria japonica. Their structures were identified as emodin (1), emodin-8-O-β-D-glucoside (2), 3,5-dihydroxybenzyl alcohol (3), citreorosein (4), cis-resveratrol (5),