the effects of a number of relatively pure opiate antagonists ( naloxone , naltrexone , diprenorphine ) , and putative mu- ( morphine , etorphine ) and kappa- ( ketocyclazocine , ethylketocyclazocine ) receptor agonists on sweetened condensed milk intake were examined over a broad range of doses in non-deprived rats and squirrel monkeys .
C0027358
naloxone
C0027360
naltrexone