Research ArticleNEUROPHARMACOLOGY
Antinociceptive Activity of [β-Methyl-2′,6′-dimethyltyrosine1]-Substituted Cyclic [d-Pen2,d-Pen5]Enkephalin and [d-Ala2,Asp4]Deltorphin Analogs
Edward J. Bilsky, Xinhua Qian, Victor J. Hruby and Frank Porreca
Journal of Pharmacology and Experimental Therapeutics April 2000, 293 (1) 151-158;