Assertion: endogenous ligand | /r/HasProperty | distinct
Facets:
value: structurally
type: DEGREE
value: entirely
type: DEGREE
Source sentences:
text: Some of these compounds are still derived from adenosine or from the xanthine family, but researchers in this area have also discovered many selective adenosine receptor ligands that are entirely structurally distinct, giving a wide range of possible directions for future research.