Morphiceptin is a potent and specific agonist for morphine (μ) receptors. Morphiceptin, as a synthetic peptide, is the amide of a fragment of the milk protein β-casein. Morphiceptin has morphinelike activities and is highly specific for morphine (μ) receptors but not for enkephalin receptors.

2,3-Dihydroxy-4-methoxybenzoic acid is a compound isolated from [sweet cherry fruit].

Biotin-(Leu8,D-Trp22,Tyr25)-Somatostatin-28