JWH-146
JWH-146 (1-heptyl-5-phenyl-1H-pyrrol-3-yl)-1-naphthalenyl-methanone) is a synthetic cannabinoid from the naphthoylpyrrole family which acts as an agonist of the CB1 (Ki = 21 ± 2nM) and CB2 (Ki = 62 ± 5nM) receptors, with a moderate (~2.9x) selectivity for the CB1 receptor over the CB2 receptor. JWH-146 was first synthesized in 2006 by John W. Huffman and colleagues to examine the nature of ligand binding to the CB1 receptor. Legality
In the United States JWH-146 is not federally scheduled, although some states have passed legislation banning the sale, possession, and manufacture of JWH-146. In Canada, JWH-146 and other naphthoylpyrrole-based cannabinoids are Schedule II controlled substances under the Controlled Drugs and Substances Act. In the United Kingdom, JWH-146 and other naphthoylpyrrole-based cannabinoids are considered Class B drugs under the Misuse of Drugs Act 1971. See also
List of JWH cannabinoids
Synthetic cannabinoid

References 

JWH cannabinoids
CB1 receptor agonists
CB2 receptor agonists
Designer drugs
Naphthoylpyrroles