fdu-nne1 fdu-nne1 fdu-nne1 (also known as fdu-nnei and fdu-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 fdu-nne1 will release 1-naphthylamine, a known carcinogen. fdu-nne1legal statuslegal status ca: schedule ii de: npsg (industrial and scientific use only) uk: class b identifiers iupac name [1-(4-fluorobenzyl)-n-(naphthalen-1-yl)-1h-indole-3-carboxamide chemspider58794744uniim5h92feg4wchemical and physical dataformulac26h19fn2omolar mass394.449 g·mol−13d model (jsmol)interactive image smiles o=c(c1=cn(cc2=cc=c(f)c=c2)c3=c1c=cc=c3)nc4=c(c=cc=c5)c5=cc=c4 inchi inchi=1s/c26h19fn2o/c27-20-14-12-18(13-15-20)16-29-17-23(22-9-3-4-11-25(22)29)26(30)28-24-10-5-7-19-6-1-2-8-21(19)24/h1-15,17h,16h2,(h,28,30)key:xysifmhzxzatqo-uhfffaoysa-n