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