:Pyrimidinedione

{{Short description|Class of chemical compounds}}

Image:Pyrimidin.svg

Pyrimidinediones are a class of chemical compounds characterized by a pyrimidine ring substituted with two carbonyl groups.

Examples include naturally occurring metabolites:

class="wikitable" ! Trivial name !! IUPAC name !! Structure!!Pathway
Uracil	Pyrimidine-2,4(1H,3H)-dione	Image:Uracil.svg	Pyrimidine biosynthesis
Thymine	5-Methylpyrimidine-2,4(1H,3H)-dione	150px	Pyrimidine biosynthesis
	5,6-Diaminopyrimidine-2,4(1H,3H)-dione		Riboflavin biosynthesis

drugs:

Image:Primidone.svg

• Fluorouracil
• Idoxuridine
• Primidone
• Trifluridine

and pesticides:

• Bromacil
• Saflufenacil