Isobutyrylfentanyl

Isobutyrylfentanyl is an opioid analgesic that is an analog of fentanyl and has been sold online as a designer drug.^[1] It is believed to be around the same potency as butyrfentanyl^[2] but has been less widely distributed on illicit markets, though it was one of the earliest of the "new wave" of fentanyl derivatives to appear, and was reported in Europe for the first time in December 2012.^[3]

Isobutyrylfentanyl

Legal status
Legal status	CA: Schedule I DE: NpSG (Industrial and scientific use only) UK: Class A US: Schedule I
Identifiers
IUPAC name 2-methyl-N-phenyl-N-[1-(1-phenylpropan-2-yl)piperidin-4-yl]propanamide
CAS Number	119618-70-1
PubChem CID	14402357
ChemSpider	10551382
UNII	LF0F3A39RV
Chemical and physical data
Formula	C23H30N2O
Molar mass	350.506 g·mol−1
3D model (JSmol)	Interactive image
SMILES CC(C)C(=O)N(C1CCN(CC1)CCC2=CC=CC=C2)C3=CC=CC=C3
InChI InChI=1S/C23H30N2O/c1-19(2)23(26)25(21-11-7-4-8-12-21)22-14-17-24(18-15-22)16-13-20-9-5-3-6-10-20/h3-12,19,22H,13-18H2,1-2H3 Key:WRPFPNIHTOSMKU-UHFFFAOYSA-N

Side effects

Side effects of fentanyl analogs are similar to those of fentanyl itself, which include itching, nausea and potentially serious respiratory depression, which can be life-threatening. Fentanyl analogs have killed hundreds of people throughout Europe and the former Soviet republics since the most recent resurgence in use began in Estonia in the early 2000s, and novel derivatives continue to appear.^[4] A new wave of fentanyl analogues and associated deaths began in around 2014 in the US, and have continued to grow in prevalence; especially since 2016 these drugs have been responsible for hundreds of overdose deaths every week.^[5]

Legal status

Isobutyrylfentanyl is a Schedule I controlled drug in the USA since 1 February 2018.^[6]

See also

• Acetylfentanyl
• Butyrfentanyl
• Cyclopropylfentanyl
• Furanylfentanyl
• List of fentanyl analogues