InChI=1S/C23H24O6/c1-28-22-13-16(9-11-20(22)26)5-3-7-18(24)15-19(25)8-4-6-17-10-12-21(27)23(14-17)29-2/h3-4,7-14,26-27H,5-6,15H2,1-2H3/b7-3-,8-4+