InChI=1S/C21H30N2O4/c1-21(2,3)27-20(26)22-13-9-5-4-6-11-16(19(24)25)17-14-23-18-12-8-7-10-15(17)18/h7-8,10,12,14,16,23H,4-6,9,11,13H2,1-3H3,(H,22,26)(H,24,25)/t16-/m0/s1