Symphony: Pharma Life Science

Pemetrexed

Impurity-D

CAS No.                   : 144051-68-3
Molecular Formula: C25H28N6O9
Molecular Weight   : 556.52
Chemical Name      : (2S)-2-[[(4S)-4-[[4-[2-(2-amino-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl]amino]-4-carboxybutanoyl]amino]pentanedioic acid.

Impurity E

CAS No.                   : 182009-04-7
Molecular Formula: C20H21N5O6
Molecular Weight   : 427.41
Chemical Name      : (2R)-2-[[4-(2-(2-amino-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl]amino]-pentanedioic acid.

Impurity 1

CAS No.                   : 1265908-63-1
Molecular Formula: C21H23N5O6
Molecular Weight   : 441.44
Chemical Name      : (S)-4-(4-(2-(2-amino-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzamido)-5-methoxy-5-oxopentanoic acid

Impurity 2

CAS No.                   : 1265908-60-8
Molecular Formula: C21H22N5NaO6
Molecular Weight   : 463.42
Chemical Name      : sodium (S)-2-(4-(2-(2-amino-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzamido)-5-methoxy-5-oxopentanoate