A new anthraquionone glycoside, emodin-1-O-ß-D-glucopyranoside, 3-O-(1,2-di-Oacetyl-a-L-rhamnopyranoside) has been isolated from fruits of R. princides together with emodin-1-O-ß-D-glycopyranoside, 3-O-a-L-rhamnopyranoside (glucofrangulin A) and emodin-1-O-ß-D-glucoside (emodin glucoside B).