InChI=1S/C23H27NO4/c1-16-12-19(14-23(2,3)13-16)27-22(26)20(17-8-5-4-6-9-17)28-21(25)18-10-7-11-24-15-18/h4-11,15-16,19-20H,12-14H2,1-3H3/t16-,19+,20?/m0/s1