2,6-Bis(dimethylamino)-4,8-bis(cyclohexylamino)pyrimido(5,4-d)pyrimidine 62134-35-4 62887-53-0 Awd 625 Awd-625 N(4),N(8)-Dicyclohexyl-N(2),N(2),N(6),N(6)-tetraethylpyrimido(5,4-d)pyrimidine-2,4,6,8-tetramine NSC 292238 Pyrimido(5,4-d)pyrimidinetetramine, N4,N8-dicyclohexyl-N2,N2,N6,N6-tetraethyl-