Abstract:The chemical constituents extracted from tubers of Polygonum multiflorum Thunb. originated from Deqing of Guangdong Province were isolated by using chromatographic techniques. On the basis of spectral data, eight phenolic components were identified, such as physcion-8-β-D-(6′-O-acetyl)glucoside (1), physcionin (2), emodin (3), epicatechin (4), torachrysone 8-O-β-D-glucopyranoside (5), 2,3,5,4′-tetrahydroxystilbene 2-O-β-D-glucopyranoside (6), 4-hydroxybenzaldehyde (7), 5-carboxymethyl-7-hydroxy-2-methylchromone (8). Compounds 1, 7 and 8 were isolated from this plant for the first time.