JWH-133 is a dibenzopyran that is Delta(9)-tetrahydrocannabinol which is lacking the hydroxy group and in which the pentyl group at position 3 has been replaced by a 1,1-dimethylbutyl group. A potent and highly selective CB2 receptor agonist. It has a role as a CB2 receptor agonist, an antineoplastic agent, a vasodilator agent, an anti-inflammatory agent, an apoptosis inhibitor, an analgesic and an opioid analgesic. It is a dibenzopyran, an organic heterotricyclic compound and a benzochromene.