InChI=1/C19H18N4O4/c1-22(13-15-9-5-6-10-16(15)23(25)26)19(24)21-12-18-20-11-17(27-18)14-7-3-2-4-8-14/h2-11H,12-13H2,1H3,(H,21,24)/f/h21H AA3BA168DCFB980D