InChI=1/C20H18O6/c1-10(2)3-8-13-14(22)9-15-16(17(13)23)18(24)19(25)20(26-15)11-4-6-12(21)7-5-11/h3-7,9,21-23,25H,8H2,1-2H3 D6BA458ED5CDE3C3