InChI=1S/C27H28O17/c28-7-13-15(31)17(33)20(36)27(42-13)43-23-16(32)14-11(40-22(23)8-1-3-9(29)4-2-8)5-10(30)6-12(14)41-26-21(37)18(34)19(35)24(44-26)25(38)39/h1-6,13,15,17-21,24,26-31,33-37H,7H2,(H,38,39)