Polycyclic aromatic hydrocarbons, a group of molecules consisting of a number of fused benzene rings, are major environmental contaminants.
This breakthrough came about through the availability of the benzene ring theory.
Closely related to the benzene ring were its condensed forms, naphthalene and anthracene.
Isoquinoline and quinoline are benzopyridines, which are composed of a benzene ring fused to a pyridine ring.
It consists of a benzene ring substituted with an amino group and a carboxylic acid.
Its structure consists of a benzene ring "para" -substituted with a methyl group and an isopropyl group.
It involved the novel introduction of a malonyl equivalent into a highly sterically hindered position of a benzene ring.
The etizolam molecule differs from a benzodiazepine in that the benzene ring has been replaced by a thiophene ring, making the drug a thienodiazepine.
