Description Buy 4-fluoroisobutyrfentanyl Online Buy 4-fluoroisobutyrfentanyl powder (also known as 4-FIBF and p-FIBF) is an opioida is an analog of butyrfentanyl and structural isomer of 4-Fluorobutyrfentanyl and has been sold online as a designer drug. It is closely related to 4-fluorofentanyl, which has an EC50 value of 4.2 nM for the human ?-opioid receptor. DESCRIPTION Names: 4-Fluoroisobutyrfentanyl para-fluoroisobutyrfentanyl, N-(4-fluorophenyl)-N-(1-phenethylpiperidin 4-yl)isobutyramide pFIBF, 4-FIBF, IUPAC name: N-(4-fluorophenyl)-N-(1-phenethylpiperidin-4-yl)isobutyramide Substance group: Other substances This substance is included in Schedule I of the 1961 Single Convention on Narcotic Drugs InChI InChI=1S/C23H29FN2O/c1-18(2)23(27)26(21-10-8-20(24)9-11-21)22-13-16-25(17-14-22)15-12-19-6-4-3-5-7-19/h3-11,18,22H,12-17H2,1-2H3 InChI Key: OZDOSQNUJIXEOR-UHFFFAOYSA-N SMILES: O=C(C(C)C)N(C1=CC=C(F)C=C1)C2CCN(CCC3=CC=CC=C3)CC2 Formula: C23H29FN2O Molar mass: 368.50 g·mol?1 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. Legality 4-Fluoroisobutyrylfentanyl is a Schedule I controlled substance in the United States. In the UK, it is a Class A drug. In Canada, it is a Schedule I drug. See also 3-Methylbutyrfentanyl 3-Methylfentanyl 4-Fluorofentanyl ?-Methylfentanyl Acetylfentanyl Acrylfentanyl Furanylfentanyl
