ortho-Chlorofentanyl, formally named N-(2-chlorophenyl)-N-[1-(2-phenylethyl)-4-piperidinyl]-propanamide, monohydrochloride is structurally similar to known opioids.
ortho-Chlorofentanyl is regulated as a Schedule I compound in the United States.
2021 – NFLIS Announcement of an Emerging Fentanyl-Related Compound ortho-Chlorofentanyl