InChI=1S/C25H26O7/c1-12-15(25(2,3)7-6-16(12)26)9-14-18(28)10-22-23(24(14)31)20(30)11-21(32-22)13-4-5-17(27)19(29)8-13/h4-5,8,10-11,15-16,26-29,31H,1,6-7,9H2,2-3H3