Pemetrexed EP Impurity D (Trisodium Salt)

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 Trisodium Salt

Smile: O=C([O-])[C@@H](NC(CC[C@H](NC(C1=CC=C(CCC2=CNC(NC(N)=N3)=C2C3=O)C=C1)=O)C([O-])=O)=O)CCC([O-])=O.[Na+].[Na+].[Na+]