etonitazepipne etonitazepipne etonitazepipne (n-piperidino etonitazene) is a benzimidazole derivative with opioid effects around 100 times more potent than morphine, which has been sold over the internet as a designer drug. etonitazepipnelegal statuslegal status de: npsg (industrial and scientific use only) uk: under psychoactive substances act identifiers iupac name 2--5-nitro-1-(2-piperidin-1-ylethyl)benzimidazole cas number734496-28-7pubchem cid162623834unii7af6ez8pmychemical and physical dataformulac23h28n4o3molar mass408.502 g·mol−13d model (jsmol)interactive image smiles ccoc1=cc=c(c=c1)cc2=nc3=c(n2ccn4ccccc4)c=cc(=c3)(=o) inchi inchi=1s/c23h28n4o3/c1-2-30-20-9-6-18(7-10-20)16-23-24-21-17-19(27(28)29)8-11-22(21)26(23)15-14-25-12-4-3-5-13-25/h6-11,17h,2-5,12-16h2,1h3key:umgxraisfruvkd-uhfffaoysa-n