InChI=1S/C21H28O12/c1-2-3-9-4-6-10(7-5-9)30-21-16(27)17(12(23)11(8-22)31-21)32-20-15(26)13(24)14(25)18(33-20)19(28)29/h2,4-7,11-18,20-27H,1,3,8H2,(H,28,29)