The present invention relates to compounds of general formula (I), wherein the groups R1, R2 and R3 are defined as in claim 1, which have valuable pharmacological properties, particularly are modulators of STING.The present invention relates to compounds of general formula (I), wherein the groups R1, R2 and R3 are defined as in claim 1, which have valuable pharmacological properties, particularly are modulators of STING. This invention relates to pyrimidine prodrug derivatives, processes for their preparation, phamaceutical compositions, and their use in therapy.La presente invención se refiere a compuestos de la fórmula general (I), (Ver fórmula) en donde los grupos R', R2 y R3 se definen como en la reivindicación 1, que tiene propiedades farmacológicas valiosas, en particular son moduladores de STING.