The molecule is a monocarboxylic acid anion resulting from the removal of a proton from the carboxylic acid group of 7-carboxy-7-deazaguanine. The major form of 7-carboxy-7-deazaguanine at pH 7.3. It is a conjugate base of a 7-carboxy-7-deazaguanine.
2-amino-4-oxo-3,7-dihydropyrrolo[2,3-d]pyrimidine-5-carboxylate