InChI=1/C13H11ClN2O4/c14-5-1-2-10(17)15-7-3-4-8-9(6-7)11(18)13(20)16-12(8)19/h3-4,6H,1-2,5H2,(H,15,17)(H,16,19,20)/f/h15-16H B7ED2D98F9F70E88