InChI=1S/C25H22O7/c1-23(2)7-5-12-9-14-17(10-15(12)31-23)29-22-25(14,28)21(27)19-18(30-22)11-16-13(20(19)26)6-8-24(3,4)32-16/h5-11,22,26,28H,1-4H3/t22-,25+/m0/s1