2-<(4-methoxybenzyl)thio>-4,6(1H,5H)-pyrimidinedione
4,6-dihydroxy-2-methylmercaptopyrimidine
2-[(3-chloro-2-fluorobenzyl)thio]pyrimidine-4,6-diol
ethyl 2-(4,6-dihydroxypyrimidin-2-ylthio)-2-phenylacetate
2-(4-fluorobenzylthio)pyrimidine-4,6-diol