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CAS Number
PubChem CID
Chemical and physical data
Formula C20H25NO4
Molar mass 343.42 g/mol
3D model (JSmol)
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14-Ethoxymetopon[1] is an opioid analog that is a derivative of metopon which has been substituted with an ethoxy group at the 14-position. It is a highly potent analgesic drug several hundred times more potent than morphine.[2]


  1. ^ US 6476044, Wnendt, Stephan; Wolfgang Strassburger & Helmut Buschmann et al., "Use of morphine derivatives as medicaments for the treatment of neuropathic problems", published 2002-11-07 
  2. ^ Fürst, Z; Búzás, B; Friedmann, T; Schmidhammer, H; Borsodi, A (1993). "Highly potent novel opioid receptor agonist in the 14-alkoxymetopon series". European Journal of Pharmacology. 236 (2): 209–15. doi:10.1016/0014-2999(93)90591-5. PMID 8391457.