InChI=1/C16H12N4O4/c1-23-16(22)9-4-2-8(3-5-9)11-10(6-17)13(18)24-15-12(11)14(21)19-7-20-15/h2-5,7,11H,18H2,1H3,(H,19,20,21)/t11-/m0/s1/f/h19H 954DF7A58C08BF0B