discovered in 1900, it was isolated by hydrolysis of yeast nuclein that was found in bovine thymus and spleen , herring sperm , and wheat germ . Read more... Edit at Wikipedia... Other names 2,4(1H,3H)-Pyrimidinedione (IUPAC Name); 2,4(1H,3H)-Pyrimidindion; 2,4-Dioxotetrahydropyrimidine; 2,4-Pyrimidinediol; 3,4-Dihydrouracil; Dihydro-pyrimidine-2,4-dione; Pyrimidin-2,4(1H,3H)-dion; pyrimidine-2,4(1H,3H)-dione; pyrimidine-2,4-diol References Please add any relevant references