Dimethylthiambutene
Dimethylthiambutene is n,N-Dimethylbut-3-en-2-amine in which each of the hydrogens at position 4 is substituted by a 2-thienyl group. An opioid analgesic drug, it is controlled under the UN Single Convention on Narcotic Drugs (1961), but is used in veterinary medicine, particularly in Japan. It has a role as an opioid analgesic. It is a member of thiophenes and a tertiary amine.