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