these relative potency relationships of oxycodone , taken in conjunction with the oral/parenteral potency ratios of codeine and oxycodone established in the previous paper and several previous relative potency assays involving morphine , oxymorphone and codeine , demonstrate a highly consistent pattern of analgesic structure-activity relationships encompassing morphine , oxymorphone , codeine and oxycodone .
C0026549
morphine
C0009214
codeine