Propanamide, N-[4-(methoxymethyl)-1-[2-(3-thienyl)ethyl]-4-piperidinyl]-N-phenyl-

N-[4-(Methoxymethyl)-1-[2-(3-thienyl)ethyl]-4-piperidinyl]-N-phenyl-propanamide is an impurity of Sufentanil (S699040), a potent derivative of Fentanyl. Analgesic (narcotic), and a controlled substance (opiate).