2,6-Difluoro-3-nitrobenzonitrile is an aliphatic compound that inhibits the activity of monoamines by binding to the endogenously produced 2,6-difluoro-3-nitrobenzonitrile (DNFB). DNFB is a nitrosamine that has been shown to be a potent inhibitor of muscle contraction. This inhibition occurs at high concentrations and has been found in muscle cells. It has also been shown to inhibit the production of nitric oxide from monoxide or homologous nitrates, which may lead to atherosclerosis. 2,6-Difluoro-3-nitrobenzonitrile is also an amine and exhibits structural similarities with other members of this family.