In organic chemistry, a<unk>  is a cyclic compound with more than one hydrocarbon loop or ring structures (benzene rings)  . The term generally includes all<unk>  aromatic compounds, including the<unk>  aromatic hydrocarbons, the heterocyclic aromatic compounds containing sulfur, nitrogen, oxygen, or another non-carbon atoms, and substituted derivatives of these.
See also<unk>  aromatic hydrocarbon.
Polycyclic compound
Heterocyclic compound
Cyclic compound
Biopolymer
Organic compound
Diatomic molecule
Nucleoside
Chemical substance