InChI=1/C17H22N2O3/c1-9-7-10(2)13(11(3)8-9)15-14(16(20)22-6)12(4)19(5)17(21)18-15/h7-8,15H,1-6H3,(H,18,21)/t15-/m0/s1/f/h18H BB37451E92580194