5-Amino-3-methyl-1,2-oxazole-4-carbonitrile

In the title compound, C₅H₅N₃O, the isoxazole ring is essentially planar, with a maximum deviation of 0.007 (1) Å from the least-squares plane. The N atom of the amine group exhibits sp² character (sum of bond angles around this atom = 358°). In the crystal, mol­ecules are aggregated by two kinds of N—H...N hydrogen bonds into fused R₂²(12) and R₆⁶(26) rings, forming a slightly puckered two-dimensional array lying parallel to (101).