InChI=1S/C27H29O17/c28-7-16-17(32)18(33)21(36)26(43-16)42-15-6-10-12(31)4-9(29)5-13(10)40-23(15)8-1-2-11(30)14(3-8)41-27-22(37)19(34)20(35)24(44-27)25(38)39/h1-6,16-22,24,26-37H,7H2,(H,38,39)