2’:4,5)furo(2,3-c)xanthen-7-one,3a,12c-dihydro-6,8-dimethoxy-7h-furo(3

2’:4,5)furo(2,3-c)xanthen-7-one,3a,12c-dihydro-6,8-dimethoxy-7h-furo(3 · CAS 17878-69-2