2-(3,4-Dihydroxy-phenyl)-7,8-dihydroxy-3,5-dimethoxy-chromen-4-one Gossypetin-3,5-dimethyl ether InChI=1/C17H14O8/c1-23-11-6-10(20)13(21)16-12(11)14(22)17(24-2)15(25-16)7-3-4-8(18)9(19)5-7/h3-6,18-21H,1-2H