Crotonylfentanyl
Summary Crotonylfentanyl is an opioid pain reliever, structurally related to fentanyl, and a structural isomer of cyclopropylfentanyl. It has been available on the internet as a designer drug. In December 2019, the United Nations Office on Drugs and Crime (UNODC) introduced scheduling recommendations to classify crotonylfentanyl as a Schedule I substance. Identifiers IUPAC name CAS …