InChI=1/C13H14N4O4/c1-13(11(19)14-12(20)15-13)6-17-10(18)8-4-3-7(21-2)5-9(8)16-17/h3-5,16H,6H2,1-2H3,(H2,14,15,19,20)/t13-/m0/s1/f/h14-15H 3D83A6624069C8A0