Ethyl 3-[(Aminocarbonyl)amino]-2-cyano-2-propenoic Acid Ester is an intermediate used in the synthesis of 5-Carboxycytosine (C177975), which is a cytosine derivatives involved with a wide variety of biological functions including cytosine methylation, gene expression, genome stability, and chromatin modification. In addition, 5-Carboxylcytosine interacts with the RNA polymerase II elongation complex that can influence the pluripotent states during early embryonic development.