3-Hydroxybenzoic acid-d4 is the deuterium labeled 3-Hydroxybenzoic acid (HY-W004049). 3-Hydroxybenzoic acid is an orally active endogenous metabolite. 3-Hydroxybenzoic acid is an agonist for GPR81 and GPR109A. 3-Hydroxybenzoic acid acts as stress response desensitizers. 3-Hydroxybenzoic acid can be used for anti-inflammatory and analgesic study[1][2][3].