API
IMPURITY
CHEMICAL NAME
STRUCTURE
2
Pemetrexed

Pemetrexed Disodium

N-[4-[2-(2-Amino-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl]-D-glutamiaciddisodium Pemetrexed-Disodium
Pemetrexed

Impurity A

N-[4-[2-(2-Amino-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoicacid Pemetrexed-Impurity-A
Pemetrexed

Pemetrexed Impurity

N-[4-[2-(2-Amino-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzoyl]-L-glutamic acid dimetyl ester 4-toluene sulphonic acid salt Pemetrexed-Impurity