Dipyridamole EP Impurity A Catalogue No. - VL47001 CAS No. - 16982-40-4 Molecular Formula - C₂₅H₄₀N₈O₂ Molecular Weight - 484.64 IUPAC Name - 2,2'-[(4,6,8-Tri-1-piperidinylpyrimido[5,4-d]pyrimidin-2-yl)imino]bisethanol Synonyms - Dipyridamole Related compound A