one of two or more substances related to each other by origin, structure, or function, üks kahest või enamast ainest, mis on seotud teis(t)ega päritolu, struktuuri või funktsiooni aspektist

carbon compounds that contain at least one benzene ring in the molecule. The ring is hexagonal with a carbon atom at each corner, and is planar with the carbon to carbon bonds intermediate in length between single and double bonds. Aromatic compounds do no undergo addition reaction as other unsaturated compounds do, but show substitution reactions in which hydrogens on the ring are replaced with other molecular species., an organic compound of the aromatic class