Brevet US6248571 - Method of producing dihydroxypyrimidine derivatives - Google???BrevetsRecherche Images Maps Play YouTube Actualit???s Gmail Drive Plus ??Connexion Recherche avanc???e dans les brevets BrevetsA process for the preparation of dihydroxypyrimidine derivatives of the general formula: in which R1 and R2 are identical or different and are a hydrogen atom, aryl group, or a C1-C4-alkyl g