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PubChem CID
Chemical and physical data
Molar mass435.564 g·mol−1
3D model (JSmol)

BU-48 is a drug that is used in scientific research. It is from the oripavine family, related to better-known drugs such as etorphine and buprenorphine.

The parent compound from which BU-48 was derived (with N-methyl rather than methylcyclopropyl on the nitrogen and lacking the aliphatic hydroxyl group) is a powerful μ-opioid agonist 1000x more potent than morphine,[1] but in contrast BU-48 has only weak analgesic effects and instead acts primarily as a δ-opioid agonist. Its main effects are to produce convulsions,[2] but it may also have antidepressant effects.[3]


  1. ^ Lewis JW, Bentley KW, Cowan A (1971). "Narcotic analgesics and antagonists". Annual Review of Pharmacology. 11: 241–70. doi:10.1146/annurev.pa.11.040171.001325. PMID 4948499.
  2. ^ Broom DC, Guo L, Coop A, Husbands SM, Lewis JW, Woods JH, Traynor JR (September 2000). "BU48: a novel buprenorphine analog that exhibits delta-opioid-mediated convulsions but not delta-opioid-mediated antinociception in mice". The Journal of Pharmacology and Experimental Therapeutics. 294 (3): 1195–200. PMID 10945877.
  3. ^ Broom DC, Jutkiewicz EM, Rice KC, Traynor JR, Woods JH (September 2002). "Behavioral effects of delta-opioid receptor agonists: potential antidepressants?". Japanese Journal of Pharmacology. 90 (1): 1–6. doi:10.1254/jjp.90.1. PMID 12396021.