in addition , both the d- and l-isomers of methadone , codeine , morphine , butorphanol and profadol resulted in predominantly saline-appropriate responding . l-cyclorphan , dl- , l- and d-skf-10,047 and l- and d-cyclazocine produced dose-related dextrorphan-appropriate responding , whereas , l-oxilorphan ( the 14-hydroxymorphinan analog of cyclorphan ) , dl- , l- and d-pentazocine , l- and d-ethylketazocine and l-naltrexone resulted in either responding exclusively on the saline-appropriate key or responding that was intermediate between that appropriate for saline and dextrorphan .
C0009214
codeine
C0026549
morphine