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