2,5,6-triamino-3,4-dihydro-4-pyrimidinone
pyruvic acid methyl ester
4-Methyl-benzoic acid (3aR,4R,6R,6aR)-6-(4-benzoylamino-2-oxo-2H-pyrimidin-1-yl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-ylmethyl ester
dimethyl acetylenedicarboxylate
diethyl oxaloacetate