The title compound (C9H7N3O) has been determined from three dimensional X-ray diffraction data. The crystals are monoclinic, a = 4.858(3) Å, b = 15.008(7) Å, c = 11.787(2) Å, ? = 94.107(2)°, V = 857.2(4) Å3, z = 4, Dcalc ...