Semorphone
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Other names | Semorphone, Mr 2264 |
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Chemical and physical data | |
Formula | C19H23NO5 |
Molar mass | 345.39 g/mol g·mol−1 |
Semorphone (Mr 2264) is an opiate analogue that is an N-substituted derivative of oxymorphone.
Semorphone is a partial agonist at μ-opioid receptors. It is around twice the potency of morphine, but with a ceiling effect on both analgesia and respiratory depression[1] which means that these effects stop becoming any stronger after a certain maximum dose.
It is not currently used in medicine, and is not a controlled drug, although it might be considered to be a controlled substance analogue of oxymorphone on the grounds of its related chemical structure in some jurisdictions such as the USA, Canada, Australia and New Zealand.
References
- ^ Behne M, Bremerich D, Heinrich J, Schumacher H, Scherer M. Respiratory effects and tolerability of Mr 2264 Cl. A new opiate partial agonist in comparison with morphine and placebo. European Journal of Clinical Pharmacology. 1994;46(4):301-4.
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