ohmecarfentanil ohmecarfentanil ohmecarfentanil (rti-4614-38), also known as ohlofentanil, is a mu opioid receptor agonist from the class of fentanyl analogues which was found to be 30,000 times more potent than morphine in the rhesus monkey single dose suppression test. this makes ohmecarfentanil, along with some closely related analogues, among the most potent opioid agonists known at this time, even surpassing lofentanil and ohmefentanyl. ohmecarfentanillegal statuslegal status ca: schedule i de: npsg (industrial and scientific use only) uk: class a identifiers iupac name methyl 1-(2-hydroxy-2-phenylethyl)-3-methyl-4-(n-propanoylanilino)piperidine-4-carboxylate pubchem cid3r,4r: 104324823r,4s: 10071012chemspider3r,4r: 86079093r,4s: 8246552chemical and physical dataformulac25h32n2o4molar mass424.541 g·mol−13d model (jsmol)3r,4r: interactive image3r,4s: interactive image smiles 3r,4r: ccc(=o)n(c1=cc=cc=c1)2(ccn(c2c)cc(c3=cc=cc=c3)o)c(=o)oc3r,4s: ccc(=o)n(c1=cc=cc=c1)2(ccn(c2c)cc(c3=cc=cc=c3)o)c(=o)oc inchi 3r,4r: inchi=1s/c25h32n2o4/c1-4-23(29)27(21-13-9-6-10-14-21)25(24(30)31-3)15-16-26(17-19(25)2)18-22(28)20-11-7-5-8-12-20/h5-14,19,22,28h,4,15-18h2,1-3h3/t19-,22?,25-/m1/s1key:hvtqdibozudmth-pjhdfatgsa-n3r,4s: inchi=1s/c25h32n2o4/c1-4-23(29)27(21-13-9-6-10-14-21)25(24(30)31-3)15-16-26(17-19(25)2)18-22(28)20-11-7-5-8-12-20/h5-14,19,22,28h,4,15-18h2,1-3h3/t19-,22?,25+/m1/s1key:hvtqdibozudmth-cgpdnssvsa-n