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Systematic (IUPAC) name
3-hydroxy- 14-ethoxy- 5-methyl- 7,8-dihydro- 4,5α-epoxy- 17-methylmorphinan- 6-one
CAS Number 131575-04-7
PubChem CID 5487378
Synonyms 14-Ethoxymetopon
Chemical data
Formula C20H25NO4
Molar mass 343.42 g/mol[[Script error: No such module "String".]]
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14-Ethoxymetopon is an opiate analogue 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 stronger than morphine.[1]


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  1. Fürst Z, Búzás B, Friedmann T, Schmidhammer H, Borsodi A. Highly potent novel opioid receptor agonist in the 14-alkoxymetopon series. European Journal of Pharmacology. 1993 May 19;236(2):209-15. PMID 8391457