(R)-3',5-dihydroxy-4',7-dimethoxyspiro(2H-1-benzopyran- 3(4H),7'-bicyclo(4.2.0)-octa(1,3,5)-trien)-4-one
(r)-3',5-dihydroxy-4',7-dimethoxyspiro(2h-1-benzopyran- 3(4h),7'-bicyclo(4.2.0)-octa(1,3,5)-trien)-4-one