InChI=1S/C17H15ClN2O3/c18-12-3-6-14-11(7-12)8-15(20-14)17(23)19-13-4-1-10(2-5-13)16(22)9-21/h1-8,16,20-22H,9H2,(H,19,23)/t16-/m0/s1