InChI=1S/C23H22O7/c1-12(24)29-22(23(2,3)27)14-11-28-18-10-16(26)20-15(25)9-17(30-21(20)19(14)18)13-7-5-4-6-8-13/h4-10,14,22,26-27H,11H2,1-3H3