1,8-Dihydroxy-2,6-dimethoxy-9H-xanthen-9-one 1,8-Dihydroxy-2,6-dimethoxyxanthen-9-one 22172-17-4 5-18-05-00186 (Beilstein Handbook Reference) 9H-Xanthen-9-one, 1,8-dihydroxy-2,6-dimethoxy- (9CI) BRN 1351740 Methylswertianin Swertiaperennin Xanthen-9-one, 1,8-dihydroxy-2,6-dimethoxy-