InChI=1S/C18H20O12/c1-4-3-5(19)6-7(8(4)20)9(21)15(28-2)13(25)14(6)29-18-12(24)10(22)11(23)16(30-18)17(26)27/h3,6,10-12,14,16,18,20,22-25H,1-2H3,(H,26,27)