77776-93-3 8-(2,4-Dichlorobenzylthio)-4-morpholino-2-piperazino-pyrimido(5,4-d)pyrimidine Pyrimido(5,4-d)pyrimidine, 8-(((2,4-dichlorophenyl)methyl)thio)-4-(4-morpholinyl)-2-(1-piperazinyl)-