Guanidinas/química; Oligopéptidos/farmacología; Receptores Opioides delta/antagonistas & inhibidores; Tetrahidroisoquinolinas/farmacología; Relación Dosis-Respuesta a Droga; Modelos Moleculares; Oligopéptidos/síntesis química; Oligopéptidos/química; Receptores Opioides delta/metabolismo; Relación Estructura-Actividad; Tetrahidroisoquinolinas/síntesis química; Tetrahidroisoquinolinas/química

(5α,7α,8ß-(−)-N-methyl-N-[7-(1-pyrrolidinyl)-1-oxaspiro[4.5]dec-8-yl]benzeneacetamide; 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid; 1,3-diisopropylcarbodiimide; 2-(1H-benzotriazol-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate; 2',6'-dimethyltyrosine; 6-chloro-1-hydroxybenzotriazole; BBB; Boc; Cl-HOBt; DAMGO; DIC; DIPP; DIPP-NH(2); DIPP-NH(2)[Ψ]; DSLET; Dmt; ES-MS; GPI; Guan; Guanidinylated opioid peptides; H-Dmt-Tic-Phe-Phe-NH(2); H-Dmt-Tic-Phe-Phe-OH; H-Dmt-TicΨ[CH(2)NH]Phe-Phe-NH(2); H-Tyr-D-Ala-Gly-Phe(NMe)-Gly-ol; H-Tyr-D-Ser-Gly-Phe-Leu-Thr-OH; H-Tyr-Tic-Phe-Phe-OH; H-Tyr-TicΨ[CH(2)NH]Phe-Phe-OH; HBTU; HPLC; MVD; Peptide synthesis; TIPP; TIPP[Ψ]; Tic; U69,593; blood­brain barrier; electrospray mass spectrometry; guanidino; guinea pig ileum; high performance liquid chromatography; mouse vas deferens; tert-butyloxycarbonyl; δ Opioid antagonists; δ Partial opioid agonists; µ Opioid agonist/δ opioid agonists; µ Opioid agonist/δ opioid antagonists