1-Pentyl-3-(4-methyl-1-naphthoyl)indole, the 4-methyl analogue of JWH-018 and one of the most potent compounds in the series (Ki 0.69 nM CB1, 1.2 nM CB2). Attributed to the 2005 Huffman naphthoylindole SAR paper on steric and electronic effects of naphthoyl substituents; the Wikipedia Ki table instead cites the 2003 naphthylmethanes paper, so the exact first report is not settled. Banned in Sweden on 1 October 2010 after appearing in herbal blends.