to further investigate the role of opioid peptides and specific opiate receptor subtypes in central cardiovascular regulation by hindbrain nuclei , mu ( d-ala2 , mephe4 , gly-ol5 enkephalin , dago ) , delta ( d-ala2 , d-leu5 enkephalin , dadl ) or kappa ( mrz 2549 ) agonists were microinjected into hindbrain nuclei of spontaneously or artificially respired , pentobarbital-anesthetized rats .
C0525773
dago
C0014298
enkephalin