The title compound, C(13)H(13)N(5)O, consists of discrete mol-ecules connected by N-H⋯N hydrogen bonds to form infinite chains, with N⋯N separations of 3.0379 (15) and 2.8853 (15) Å. The benzene and purine ring systems make a dihedral angle of 77.58 (3)°. The crystal structure is further stabilized by intra-molecular N⋯O inter-actions [2.9541 (12) Å] and inter-molecular C-H⋯C and C⋯C contacts [3.304 (2), 3.368 (2), 3.667 (2), 3.618 (2) and 3.512 (2) Å] which arrange the mol-ecules into graphite-like layers. The inter-layer separations are 3.248 and 3.256 Å.