25i-nb4ome 25i-nb4ome 25i-nb4ome (2c-i-nb4ome, nb4ome-2c-i) is a derivative of the phenethylamine hallucinogen 2c-i, which acts as a highly potent partial agonist for the human 5-ht2a receptor. 25i-nb4omeclinical dataatc codenoneidentifiers iupac name 2-(4-iodo-2,5-dimethoxyphenyl)-n-ethanamine cas number1566571-41-2 ypubchem cid118796481chemspider52085624 yuniiivg065dv7jchemical and physical dataformulac18h22ino3molar mass427.282 g·mol−13d model (jsmol)interactive image smiles coc1=cc=c(c=c1)cnccc2=cc(=c(c=c2oc)i)oc inchi inchi=nworogltelswaz-uhfffaoysa-nkey:nworogltelswaz-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.