n-benzyl-2c-b n-benzyl-2c-b n-benzyl-2c-b (25b-nb, nb-2c-b) is a recreational designer drug from the 25-nb subgroup of the substituted phenethylamine family, with psychedelic effects. it has a binding affinity (ki) of 16 nm at the serotonin receptor 5-ht2a and 90 nm at 5-ht2c and reportedly has a potency in between that of 2c-b and nbome-2c-b. n-benzyl-2c-bidentifiers iupac name n-benzyl-2-(4-bromo-2,5-dimethoxyphenyl)ethanamine cas number155639-26-2pubchem cid10360487chemspider8535936unii2d6q55542wchemblchembl292692chemical and physical dataformulac17h20brno2molar mass350.256 g·mol−13d model (jsmol)interactive image smiles coc1=cc(=c(c=c1ccncc2=cc=cc=c2)oc)br inchi inchi=1s/c17h20brno2/c1-20-16-11-15(18)17(21-2)10-14(16)8-9-19-12-13-6-4-3-5-7-13/h3-7,10-11,19h,8-9,12h2,1-2h3key:xxlrsxiqvkhkpm-uhfffaoysa-n