An aminopyrimidine that is N-cyclohexyl-N-methylpyrimidin-2-amine in which the pyrimidine ring is substituted at position 4 by an imidazo[1,2-a]pyridin-3-yl group. It is an inhibitor of interleukin-1 receptor-associated kinase 4 (IRAK-4; EC 2.7.11.1).