1-Pentyl-3-(4-chloro-1-naphthoyl)indole; Ki 2.3 nM CB1, 2.8 nM CB2. Reported in Huffman's chapter in The Cannabinoid Receptors (Humana, 2009) and characterised in full in the 2012 halogenated-naphthoyl SAR paper by Wiley, Smith, Chen, Martin and Huffman. The EMCDDA had already found it in three 'herbal incense' products bought online between February and June 2009, so the bench synthesis clearly predates both publications; the year given is the first published report, not the synthesis date.