2c-b-aminorex 2c-b-aminorex 2c-b-aminorex (2c-b-ar) is a recreational designer drug with psychedelic effects. it is a substituted aminorex derivative which was first identified in sweden in june 2019. 2c-b-aminorexidentifiers iupac name 5-(4-bromo-2,5-dimethoxyphenyl)-4,5-dihydro-1,3-oxazol-2-amine pubchem cid155884877uniihby9bq3yjkchemical and physical dataformulac11h13brn2o3molar mass301.140 g·mol−13d model (jsmol)interactive image smiles coc1=cc(=c(c=c1c2cn=c(o2)n)oc)br inchi inchi=1s/c11h13brn2o3/c1-15-8-4-7(12)9(16-2)3-6(8)10-5-14-11(13)17-10/h3-4,10h,5h2,1-2h3,(h2,13,14)/t10-/m0/s1key:xutchzhtidhqop-jtqlqieisa-n