InChI=1S/C27H28O17/c1-7-15(31)17(33)20(36)26(40-7)43-23-16(32)14-11(30)5-9(28)6-13(14)41-22(23)8-2-3-10(29)12(4-8)42-27-21(37)18(34)19(35)24(44-27)25(38)39/h2-7,15,17-21,24,26-31,33-37H,1H3,(H,38,39)