InChI=1S/C23H20O13/c1-6-14(27)20(33-7(2)24)15(28)23(32-6)36-17-11(26)5-9-13-12-8(22(30)35-19(13)17)4-10(25)16(31-3)18(12)34-21(9)29/h4-6,14-15,20,23,25-28H,1-3H3