InChI=1S/C18H22ClNO4/c1-4-11(2)5-6-12-9-13-14(10-20(12)7-8-21)16(22)18(3,24)17(23)15(13)19/h5-6,9-11,21,24H,4,7-8H2,1-3H3/b6-5+/t11-,18-/m0/s1