25c-nb4ome 25c-nb4ome 25c-nb4ome (2c-c-nb4ome, nb4ome-2c-c) is a derivative of the phenethylamine hallucinogen 2c-c, which acts as a highly potent partial agonist for the human 5-ht2a receptor. 25c-nb4omeclinical dataatc codenoneidentifiers iupac name 2-(4-chloro-2,5-dimethoxyphenyl)-n-ethanamine cas number1566571-35-4 ypubchem cid118796506chemspider52085660 yuniisz8m8k1llkchemical and physical dataformulac18h22clno3molar mass335.83 g·mol−13d model (jsmol)interactive image smiles coc1=cc=c(c=c1)cnccc2=cc(=c(c=c2oc)cl)oc inchi inchi=1s/c18h22clno3/c1-21-15-6-4-13(5-7-15)12-20-9-8-14-10-18(23-3)16(19)11-17(14)22-2/h4-7,10-11,20h,8-9,12h2,1-3h3key:qegzbqxbcvumcu-uhfffaoysa-n legality united kingdom this substance is a class a drug in the united kingdom as a result of the n-benzylphenethylamine catch-all clause in the misuse of drugs act 1971.