InChI=1/C16H22N2O3/c1-11(2)7-8-18-14-6-4-3-5-12(14)9-13(16(18)20)10-15(19)17-21/h3-6,11,13,21H,7-10H2,1-2H3,(H,17,19)/t13-/m1/s1/f/h17H 68CB77ADBD2735EA