Assertion: ligand's group | /r/HasAspect | 20 or less carbon atoms
Facets:
value: out of those groups
type: OTHER
Source sentences:
text: In one version, the spacer site may be formed of a substituted or unsubstituted hydrocarbon group, such as a hydrocarbon group formed of a linear or branched alkyl group having 20 or less carbon atoms, or even a hydrocarbon group having 12 or less carbon atoms out of those groups.