Research ArticleABSORPTION, DISTRIBUTION, METABOLISM, AND EXCRETION
In Vitro Stability and In Vivo Pharmacokinetic Studies of a Model Opioid Peptide, H-Tyr-d-Ala-Gly-Phe-d-Leu-OH (DADLE), and Its Cyclic Prodrugs
Jerry Z. Yang, Weiqing Chen and Ronald T. Borchardt
Journal of Pharmacology and Experimental Therapeutics November 2002, 303 (2) 840-848; DOI: https://doi.org/10.1124/jpet.102.037135