InChI=1/C20H14N2O4/c1-21-17-8-4-2-6-14(17)16(20(21)23)12-13-10-11-19(26-13)15-7-3-5-9-18(15)22(24)25/h2-12H,1H3/b16-12-	434108AE26F08D9A