15-Deoxy-delta-12,14-prostaglandin J2-d4 is the deuterium labeled 15-Deoxy-delta-12,14-prostaglandin J2. 15-Deoxy-delta-12,14-prostaglandin J2 (15d-PGJ2) is a cyclopentenone prostaglandin and a metabolite of PGD2. 15-Deoxy-delta-12,14-prostaglandin J2 is a selective PPARgamma (EC50 of 2 µM) and a covalent PPARdelta agonist. 15-Deoxy-delta-12,14-prostaglandin J2 promotes efficient differentiation of C3H10T1/2 fibroblasts to adipocytes with an EC50 of 7 µM[1][2].