InChI=1S/C18H14ClN3O4/c1-9(23)10-2-4-11(5-3-10)21-18(26)13-8-20-22-17(13)12-6-14(19)16(25)7-15(12)24/h2-8,24-25H,1H3,(H,20,22)(H,21,26)