GW 501516 is an aromatic ether that is phenoxyacetic acid in which the phenyl group is substituted at position 2 by a methyl group and at position 4 by a (1,3-thiazol-5-ylmethyl)sulfanediyl group, and in which the 1,3-thiazolyl group is substituted at positions 2 and 4 by p-trifluoromethylphenyl and methyl groups, respectively. It has a role as a carcinogenic agent and a PPARbeta/delta agonist. It is a monocarboxylic acid, an aromatic ether, an aryl sulfide, an organofluorine compound and a member of 1,3-thiazoles.