InChI=1S/C27H28O18/c1-6-14(30)17(33)21(37)26(41-6)42-8-4-9(28)13-11(5-8)43-23(19(35)16(13)32)7-2-10(29)15(31)12(3-7)44-27-22(38)18(34)20(36)24(45-27)25(39)40/h2-6,14,17-18,20-22,24,26-31,33-38H,1H3,(H,39,40)