The title compound is an antimalarial agent. The crystal of the hydrochloride salt, C12H13ClN4·HCl, belongs to space group P21/c with cell dimensions of a = 11.138(4), b = 8.408(3), c = 14.676(6)Å, β = 100.24(2)°. The final R value is 0.069. The dihedral angle between the pyrimidine and phenyl rings is 63.6(1)°. The N1 atom is protonated.
