5f-pcn 5f-pcn 5f-pcn (also known as 5f-mn-21) is an azaindole-based synthetic cannabinoid that is presumed to be a potent agonist of the cb1 receptor and has been sold online as a designer drug. it is closely related to nne1. given the known metabolic liberation (and presence as an impurity) of amantadine in the related compound apinaca, it is suspected that metabolic hydrolysis of the amide group of 5f-pcn may release 1-naphthylamine, a known carcinogen. 5f-pcnlegal statuslegal status ca: schedule ii uk: class b identifiers iupac name 1-(5-fluoropentyl)-n-(naphthalen-1-yl)-1h-pyrrolopyridine-3-carboxamide cas number2219332-48-4 ypubchem cid125181244chemspider34450856uniiq7gh2ggj3echemical and physical dataformulac23h22fn3omolar mass375.447 g·mol−13d model (jsmol)interactive image smiles o=c(nc1=c(c=cc=c2)c2=cc=c1)c3=cn(cccccf)c4=c3c=nc=c4 inchi inchi=1s/c23h22fn3o/c24-12-4-1-5-14-27-16-20(19-15-25-13-11-22(19)27)23(28)26-21-10-6-8-17-7-2-3-9-18(17)21/h2-3,6-11,13,15-16h,1,4-5,12,14h2,(h,26,28)key:brrzrrzuerbdql-uhfffaoysa-n legal status sweden's public health agency suggested to classify 5f-pcn as hazardous substance on november 10, 2014.