Diaminopyrimidine
Diaminopyrimidines are a class of organic chemical compounds that include two amine groups on a pyrimidine ring.
[Image:Iclaprim.svg|thumb|right|250px|Iclaprim]
[Image:Trimethoprim.svg|thumb|right|250px|Trimethoprim]
They include many dihydrofolate reductase inhibitor drugs.
Some have been patented as anti-cancer drugs.