InChI=1S/C27H28O18/c28-5-11-14(32)17(35)19(37)23(43-11)13-16(34)24(44-27-21(39)18(36)20(38)25(45-27)26(40)41)15(33)12-9(31)4-10(42-22(12)13)6-1-2-7(29)8(30)3-6/h1-4,11,14,17-21,23,25,27-30,32-39H,5H2,(H,40,41)