d-galactosamine , a stimulator of the de novo pyrimidine pathway , was also studied and found to increase total liver uridine ( uridine plus uracil nucleotides and uridine diphosphate esters ) by 4-fold at 8 hr , returning to normal by 24 to 48 hr .
C0041921
uridine
C0041986
uridine diphosphate