Adapalene-d3 is the deuterium labeled Adapalene. Adapalene (CD271), a third-generation synthetic retinoid, is widely used for the research of acne. Adapalene is a potent RAR agonist, with AC50s of 2.3 nM, 9.3 nM, and 22 nM for RARbeta, RARgamma, RARalpha, respectively. Adapalene also inhibits the enzymatic activity of GOT1 in a non-competitive manner. Adapalene exhibits anti-tumor activity[1][2][3].