5f-nne1 5f-nne1 5f-nne1 (also known as 5f-nnei and 5f-mn-24) is an indole-based synthetic cannabinoid that is presumed to be a potent agonist of the cb1 receptor and has been sold online as a designer drug. 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-nne1 may release 1-naphthylamine, a known carcinogen. 5f-nne1legal statuslegal status ca: schedule ii de: npsg (industrial and scientific use only) uk: class b identifiers iupac name 1-(5-fluoropentyl)-n-(naphthalen-1-yl)-1h-indole-3-carboxamide cas number1445580-60-8pubchem cid118796566chemspider29341632unii3t22qdp4d9chemical and physical dataformulac24h23fn2omolar mass374.459 g·mol−13d model (jsmol)interactive image smiles fcccccn1cc(c2c1cccc2)c(=o)nc1cccc2c1cccc2 inchi inchi=1s/c24h23fn2o/c25-15-6-1-7-16-27-17-21(20-12-4-5-14-23(20)27)24(28)26-22-13-8-10-18-9-2-3-11-19(18)22/h2-5,8-14,17h,1,6-7,15-16h2,(h,26,28)key:djkvobzlmbhfkx-uhfffaoysa-n legality sweden's public health agency suggested classifying 5f-nne1 as hazardous substance on november 10, 2014.