API
IMPURITY
CHEMICAL NAME
STRUCTURE
2
Dipyridamole

EP Impurity B

 2: 2,2’,2’’,2’’’,2’’’’,2’’’’[[8-(piperidin-1-yl)pyrimido[5,4-d]pyrimidine-2,4,6-triyl]trinitrilo]hexaethanol, DipyridamoleEP Impurity B
Dipyridamole

EP Impurity A

 2,2¢-[[4,6,8-tri(piperidin-1-yl)pyrimido[5,4-d]pyrimidin-2-yl]nitrilo]diethanol, DipyridamoleEP Impurity B
Dipyridamole

EP Impurity F

 2,2¢,2¢¢,2¢¢¢-[[4-[(2-hydroxyethyl)amino]-8-(piperidin-1-yl)pyrimido[5,4-d]pyrimidine-2,6-diyl]dinitrilo]tetraethanol DipyridamoleEP Impurity F
Dipyridamole

Trichloro impurity(Mono)

 2,4,6-trichloro-8-(piperidin-1-yl)pyrimido[5,4-d]pyrimidine DipyridamoleTrichloro impurity(Mono)
Dipyridamole

EP Impurity D

 2,2¢-[[6-[(2-hydroxyethyl)amino]-4,8-di(piperidin-1-yl)pyrimido[5,4-d]pyrimidin-2-yl]nitrilo]diethanol, DipyridamoleEP Impurity D
Dipyridamole

EP Impurity D

 2,2¢-[[6-[(2-hydroxyethyl)amino]-4,8-di(piperidin-1-yl)pyrimido[5,4-d]pyrimidin-2-yl]nitrilo]diethanol, DipyridamoleEP Impurity D
Dipyridamole

EP Impurity C

 2,2¢-[[6-chloro-4,8-di(piperidin-1-yl)pyrimido[5,4-d]pyrimidin-2-yl]nitrilo]diethanol DipyridamoleEP Impurity C
Dipyridamole

EP Impurity G

 2,6-dichloro-4,8-di(piperidin-1-yl)pyrimido[5,4-d]pyrimidine DipyridamoleEP Impurity G
Dipyridamole

EP Impurity E

 2,2¢,2¢¢,2¢¢¢-[[6,8-di(piperidin-1-yl)pyrimido[54-d]pyrimidine-2,4-diyl]dinitrilo]tetraethanol, DipyridamoleEP Impurity E
Dipyridamole

Tetrachloro impurity

 2,4,6,8-Tetrachloropyrimidopyrimidine DipyridamoleTetrachloro impurity
Dipyridamole

Dichloro impurity

 Dipyridamole dichloro impurity DipyridamoleDichloro impurity