InChI=1S/C21H34N2O4/c1-14(24)18(20(26)22-16-9-5-3-6-10-16)13-19(15(2)25)21(27)23-17-11-7-4-8-12-17/h16-19H,3-13H2,1-2H3,(H,22,26)(H,23,27)