InChI=1S/C20H19Cl2N3O3/c21-14-1-6-18(19(22)9-14)20(12-25-8-7-24-13-25)27-11-17(28-20)10-26-16-4-2-15(23)3-5-16/h1-9,13,17H,10-12,23H2