InChI=1/C18H23ClN2O4/c1-12(2)18(5,11-20)21-15(22)10-24-16(23)17(3,4)25-14-8-6-13(19)7-9-14/h6-9,12H,10H2,1-5H3,(H,21,22)/t18-/m0/s1/f/h21H ABAAC9BB8CA4242E