InChI=1S/C25H22O7/c1-24(2)5-4-6-25(3)17(24)9-12-18-16(10-14(28)21(12)32-25)31-23-20(29)19-13(27)7-11(26)8-15(19)30-22(18)23/h4,6-8,10,17,26-28H,5,9H2,1-3H3