InChI=1S/C20H17Cl3N2O2/c1-14(25-9-8-24-13-25)20(18-7-4-16(22)12-19(18)23)27-11-10-26-17-5-2-15(21)3-6-17/h2-9,12-13H,10-11H2,1H3/b20-14-