InChI=1/C18H13Cl2NO4/c1-9-6-14-12(7-13(9)20)16(23)18(24-8-15(21)22)17(25-14)10-2-4-11(19)5-3-10/h2-7H,8H2,1H3,(H2,21,22)/f/h21H2 2649B181CAA41E4F