Pifithrin-β

The title compound, 2-p-tolyl-5,6,7,8-tetra­hydro­benzo­[d]­imidazo­[2,1-b]­thia­zole, C₁₆H₁₆N₂S, is a condensation product of pifithrin-α, which has been previously reported as an inhibitor of the tumour suppressor protein p53. The mol­ecule contains a planar fused pair of heterocyclic five-membered rings and the attached p-tolyl substituent is also essentially coplanar.