2-Methylsulfonyl-1,2,4-triazolo[1,5-a]quinazolin-5(4H)-one

Abstract

The triazoloquinazoline fused-ring system of the title compound, C 10H8N4O3S, is essentially planar (r.m.s. deviation = 0.027 Å). In the crystal, adjacent molecules are linked by N - H⋯Osulfonyl hydrogen bonds, generating a helical chain running along the b axis.