11-cis-Retinoic Acid-d5 is the deuterium labeled Retinoic acid. Retinoic acid is a metabolite of vitamin A that plays important roles in cell growth, differentiation, and organogenesis. Retinoic acid is a natural agonist of RAR nuclear receptors, with IC50s of 14 nM for RARalpha/beta/gamma. Retinoic acid bind to PPARbeta/delta with Kd of 17 nM. Retinoic acid acts as an inhibitor of transcription factor Nrf2 through activation of retinoic acid receptor alpha[1][2].