The herbs of Atropa belladonna L.

Malonic acid (propanedioic acid) is the archetypal example of a competitive inhibitor: it acts against succinate dehydrogenase (complex II) in the respiratory electron transport chain. Malonic acid is found to be associated with malonyl-CoA decarboxylase deficiency which is an inborn error of metabolism.

3’-Deoxythymidine inhibits the ability of bacteriophage T7 to infect Escherichia coli by inhibiting phage DNA synthesis. Also, it is a precursor of DNA polymerase β inhibitor.