InChI=1S/C19H13ClN2O6/c1-9(23)28-16(10-4-2-5-11(20)8-10)19(27)21-13-7-3-6-12-14(13)15(24)18(26)22-17(12)25/h2-8,16H,1H3,(H,21,27)(H,22,25,26)/t16-/m0/s1