SMILES: C1=CC(=CC=C1CCC2=CNC3=C2C(=O)NC(=N3)N)C(=O)N[C@@H](CCC(=O)[O-])C(=O)[O-]
Description: The molecule is a dicarboxylic acid dianion obtained by deprotonation of both carboxy groups of pemetrexed. It is a dicarboxylic acid dianion and a N-acyl-L-alpha-amino acid anion. It is a conjugate base of a pemetrexed.