[a combination of two or more closely associated elements which tend to remain together in reactions, behaving chemically as if they were individual entities. ( CSP )]
UMLS (CSP) C0596316 - Chemical Viewed Structurally
Relation/PAR: Chemical
Relation/CHD: acyl group
alkyl group
amino group
carbonyl group
Carboxy
chromophore
protective chemical group
Hydroxy