Ethylmethylthiambutene (N-ethyl-N-methyl-1-methyl-3,3-di-2-thienylallylamine; Emethibutin) is an opioid analgesic drug from the thiambutene family, around 1.3x the potency of morphine.^[2][3][4] It is under international control under Schedule I of the UN Single Convention On Narcotic Drugs 1961, presumably due to high abuse potential.

Quick Facts Clinical data, ATC code ...

Ethylmethylthiambutene

Clinical data
ATC code	none
Legal status
Legal status	BR: Class A1 (Narcotic drugs)[1] CA: Schedule I DE: Anlage I (Authorized scientific use only) US: Schedule I
Identifiers
IUPAC name N-ethyl-N-methyl-4,4-dithiophen-2-yl-but-3-en-2-amine
CAS Number	441-61-2
PubChem CID	46424
DrugBank	DB01468 Y
ChemSpider	42256 Y
UNII	722BFZ899Q
KEGG	D12663 Y
ECHA InfoCard	100.006.482
Chemical and physical data
Formula	C15H19NS2
Molar mass	277.44 g·mol−1
3D model (JSmol)	Interactive image
SMILES CCN(C)C(C)C=C(C1=CC=CS1)C2=CC=CS2
InChI InChI=1S/C15H19NS2/c1-4-16(3)12(2)11-13(14-7-5-9-17-14)15-8-6-10-18-15/h5-12H,4H2,1-3H3 Y Key:MORSAEFGQPDBKM-UHFFFAOYSA-N Y
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It is a Schedule I controlled substance in the United States with a DEA ACSCN of 9623 and zero annual manufacturing quota as of 2013.^{[citation needed]}