N-Phenethyl-14-ethoxymetopon is a drug that is a derivative of metopon. It is a potent analgesic, around 60 times stronger than morphine and produces significantly less constipation. N-Phenethyl-14-ethoxymetopon acts as an agonist at both μ- and δ-opioid receptors, with a Ki of 0.16nM at μ and 3.14nM at δ. See also 14-Cinnamoyloxycodeinone 14-Phenylpropoxymetopon 7-PET MR-2096 N-Phenethylnormorphine Phenomorphan RAM-378 Ro4-1539 References Delta-opioid receptor agonists 4,5-Epoxymorphinans Phenols Ketones Ethers Mu-opioid receptor agonists Semisynthetic opioids