4-(2,4-dimorpholin-4-ylpyrimido[5,4-d]pyrimidin-8-yl)morpholine

2-N,4-N,8-N-trimethylpyrimido[5,4-d]pyrimidine-2,4,8-triamine

2,4,8-trichloropyrimido[5,4-d]pyrimidine

2-chloro-4-N,8-N-dimethylpyrimido[5,4-d]pyrimidine-4,8-diamine

4-(2-chloro-4-morpholin-4-ylpyrimido[5,4-d]pyrimidin-8-yl)morpholine