InChI=1S/C23H26N2O3/c1-16-12-17(2)23-19(13-16)18(14-22(26)28-23)15-24-8-10-25(11-9-24)20-6-4-5-7-21(20)27-3/h4-7,12-14H,8-11,15H2,1-3H3