16908-54-6 Ethanol, 2,2',2'',2'''-[(2,6-di-4-morpholinylpyrimido[5,4-d]pyrimidine-4,8-diyl)dinitrilo]tetrakis- Ethanol, 2,2',2'',2'''-[(2,6-dimorpholinopyrimido[5,4-d]pyrimidine-4,8-diyl)dinitrilo]tetra- NSC516471