InChI=1/C14H13N3O4/c1-7-5-11(17-21-7)14(19)15-9-3-4-12-10(6-9)16-13(18)8(2)20-12/h3-6,8H,1-2H3,(H,15,19)(H,16,18)/t8-/m1/s1/f/h15-16H EFF666D5C471D485