InChI=1S/C28H31O17/c1-40-15-4-9(2-3-13(15)42-28-23(37)20(34)21(35)25(45-28)26(38)39)24-16(7-11-12(31)5-10(30)6-14(11)41-24)43-27-22(36)19(33)18(32)17(8-29)44-27/h2-7,17-23,25,27-37H,8H2,1H3,(H,38,39)