SMILES: C1=NC(=O)NC(=C1C(=O)O)N
Description: The molecule is a nucleobase analogue that is cytosine in which the hydrogen at position 5 is replaced by a carboxy group. It has a role as a metabolite. It is an aminopyrimidine, a nucleobase analogue, a pyrimidone and an aromatic carboxylic acid. It derives from a cytosine.