Ardisic acid B, isolated previously by one of us (Chu),from the Chinese drug, Kai-ho-chien, Ardisia hortorzcm Max. has been proved to be identical with bergenin, whkch was isolated for the first the from several species of Saxifrage by Garreau and M} chelart in 1880 and was characterized later as 2-tetrahydroxybutyl-4,6-dihydroxy-o-methoxyisocoumarin by Tschitschibabin and co-workers.