Some pyrimidine derivatives, such as pyrithiobac and bispyribac, are used as herbicides to control weeds in agricultural settings. These compounds inhibit the enzyme acetolactate synthase (ALS), which ...

This image illustrates the chemical structure of a purine molecule, highlighting the numbering of the carbon and nitrogen atoms. The purine structure consists of a pyrimidine ring (positions 1 to 6) ...