InChI=1S/C23H22O7/c1-12(2)5-7-14-20(25)23(27-4)22(26-3)18-19(24)15(10-28-21(14)18)13-6-8-16-17(9-13)30-11-29-16/h5-6,8-10,25H,7,11H2,1-4H3