InChI=1S/C23H22O5/c1-14-9-16(5-7-20(14)25)10-19-17(12-18(24)13-22(19)27)6-3-15-4-8-21(26)23(11-15)28-2/h3-9,11-13,24-27H,10H2,1-2H3/b6-3+