Flavonol triglycosides from Magnolia utilis

Three undescribed flavonol triglycosides, rhamnetin-3-O-α-L-rhamnopyranosyl-(1→2)-[α-L-rhamnopyranosyl-(1→6)]-β- d -glucopyranoside (champaluangoside A), rhamnetin-3-O-α- l -rhamnopyranosyl-(1→2)-[α- l -rhamnopyranosyl-(1→6)]-β- d -galactopyranoside (champaluangoside B) and rhamnocitrin-3-O-α- l -rhamnopyranosyl-(1→2)-[α- l -rhamnopyranosyl-(1→6)]-β- d -glucopyranoside (champaluangoside C), were isolated from Magnolia utilis in addition to eleven known compounds; quercetrin-3-O-α- l -rhamnopyranosyl-(1→2)-[α- l -rhamnopyranosyl-(1→6)]-β- d -glucopyranoside, oxytroflavoside G, magnoloside A, magnoloside M, magnoloside D, manglieside A, manglieside B, 1,2-di-O-β- d -glucopyranosyl-4-allylbebzene, syringrin, benzyl β- d -allopyranoside and (+)-syringaresinol-O-β- d -glucopyranoside. The structure elucidation of these compounds was based on analyses of physical and spectroscopic data.