An anthraquinone and three naphthopyrone derivatives from Cassia pudibunda

Chemical examination of the methanolic extract of the roots of Cassia pudibunda led to isolation of the new rubrofusarin-6- O-β- d-glucopyranoside, quinquangulin-6- O-β- d-apiofuranosyl-(1→6)- O-β- d-glucopyranoside, quinquangulin-6- O-β- d-glucopyranoside and chrysophanol dimethyl ether. Moreover the known chrysophanol, physcion, cis-3,3′,5,5′-tetrahydroxy-4-methoxystilbene, trans-3,3′,5,5′-tetrahydroxy-4-methoxystilbene, and cassiaside B were identified. The antimicrobial activity of some of these compounds is also reported.