[Endogenous opioids].
D001921:Brain / Q000502:physiology*; D004723:Endorphins / Q000502:physiology*; D006801:Humans; D011957:Receptors, Opioid / Q000502:physiology*; D013329:Structure-Activity Relationship
D004723:Endorphins; D011957:Receptors, Opioid
Endogene opioide.