File:Adenin (chemicalstructure).svg de Wesalius. File:Adenine-3D-balls.png de Vesprcom. File:Guanin (vzorec).svg de Wesalius. File:Guanine-3D-balls.png de Vesprcom
DescriptionUracil tautomers.pngchemicalstructure of uracil showing tuatomers Date 13 March 2008, 16:49 (UTC) Source Own work Author Edgar181 Permission
DescriptionUracil tautomers.svg English: Chemicalstructure of uracil showing tuatomers. Español: Estructura química del uracil junto a un tautómero. Date