JWH-164 is a synthetic cannabinoid receptoragonist from the naphthoylindole family. It has approximately equal affinity for the CB1 and CB2 receptors, with a Ki of 6.6nM at CB1 and 6.9nM at CB2. JWH-164 is a positional isomer of the related compound JWH-081, but with a methoxy group at the 7-position of the naphthyl ring, rather than the 4-position as in JWH-081. Its potency is intermediate between that of JWH-081 and its ring unsubstituted derivative JWH-018, demonstrating that substitution of the naphthyl 7-position can also result in increased cannabinoid receptor binding affinity.
^Huffman JW, et al. Structure–activity relationships for 1-alkyl-3-(1-naphthoyl)indoles at the cannabinoid CB1 and CB2 receptors: steric and electronic effects of naphthoyl substituents. New highly selective CB2 receptor agonists. Bioorganic and Medicinal Chemistry. 2005; 13:89-112. PMID15582455
^Huffman JW, Padgett LW. Recent Developments in the Medicinal Chemistry of Cannabimimetic Indoles, Pyrroles and Indenes. Current Medicinal Chemistry, 2005; 12: 1395-1411. PMID15974991