initially , dose-effect curves for the mu opioid agonists morphine and l-methadone , the kappa opioid agonists u50,488 and tifluadom , the mixed mu/kappa opioid agonist ethylketocyclazocine , and the non-opioid compound pentobarbital were determined in non-tolerant squirrel monkeys .
C0025605
methadone
C1373059
opioid agonists