3f-neh 3f-neh 3f-neh (3-fluoro-n-ethylhexedrone) is a recreational designer drug from the substituted cathinone family, with stimulant effects. it was first identified in sweden in october 2020. 3f-nehidentifiers iupac name 2-(ethylamino)-1-(3-fluorophenyl)hexan-1-one pubchem cid163195773chemical and physical dataformulac14h20fnomolar mass237.318 g·mol−13d model (jsmol)interactive image smiles o=c(c1cc(f)ccc1)c(cccc)ncc