InChI=1S/C33H28O7/c1-13-7-18(34)26-20(9-13)38-22-11-23-24(16(4)25(22)26)17-6-15(3)12-32(5)28-27-19(35)8-14(2)10-21(27)39-29(28)31(36)33(37,40-23)30(17)32/h6-11,17,30,34-35,37H,12H2,1-5H3