
N-terminal guanidinylation of TIPP (Tyr-Tic-Phe-Phe) peptides results in major changes of the opioid activity profile
Keywords: BBB; blood-brain barrier; Boc; tert-butyloxycarbonyl; Cl-HOBt; 6-chloro-1-hydroxybenzotriazole; DAMGO; H-Tyr-D-Ala-Gly-Phe(NMe)-Gly-ol; DIC; 1,3-diisopropylcarbodiimide; DIPP; H-Dmt-Tic-Phe-Phe-OH; DIPP-NH2; H-Dmt-Tic-Phe-Phe-NH2; DIPP-NH2[Ψ]; H-Dmt-Ti