2,6-Dichloro-4,8-di-1-piperidinylpyrimido[5,4-D]pyrimidine7139-02-8100 % similar Dipyridamole58-32-247 % similar 2,4,6,8-Tetrachloropyrimido[5,4-D]pyrimidine32980-71-536 % similar 4-Pyrrolidinylpyridine2456-81-735 % similar 2,4-Dichloro-6-morpholino-1,3,5-triazine6601-22-535 % similar 1-Phenylpyrrolidine4096-21-333 % similar