About: endogenous opioid

Premodifier: endogenous
Head noun: opioid

Same concepts
http://dbpedia.org/resource/Opioid_peptide

Broader concepts

label	provenance	confidence

Narrower concepts

label	provenance	confidence
endorphin	isap:133753710	0.575132
enkephalin	isap:255988177	0.466471
morphine	isap:481216758	0.338513