InChI=1S/C33H28O9/c1-13-4-17-24-14(2)25-22(40-20-7-15(11-34)5-18(36)26(20)25)9-23(24)42-33(39)30(17)32(3,10-13)28-27-19(37)6-16(12-35)8-21(27)41-29(28)31(33)38/h4-9,17,30,34-37,39H,10-12H2,1-3H3