InChI=1S/C23H24O6/c1-26-19-11-17(12-20(15-19)27-2)9-10-18(24)8-6-5-7-16-13-21(28-3)23(25)22(14-16)29-4/h5-15,25H,1-4H3/b7-5+,8-6+,10-9+