2-Amino-5-methyl-1,2,4-triazolo[1,5-a]pyrimidin-7(4H)-one

The asymmetric unit of the title compound, C6H7N5O, consists of two molecules with almost identical conformations. In the crystal, inversion dimers linked by pairs of N—H...N hydrogen bonds occur for both molecules; further N—H...N and N—H...O hydrogen bonds connect the dimers into a three-dimensional network