InChI=1S/C18H23ClN2O2/c1-12-7-8-14(19)10-16(12)20-18(23)13-9-17(22)21(11-13)15-5-3-2-4-6-15/h7-8,10,13,15H,2-6,9,11H2,1H3,(H,20,23)/t13-/m0/s1