5-{2-[(2,4-diamino-6-oxo-1,6-dihydropyrimidin-5-yl)sulfanyl]ethyl}thiophene-2-carboxylic acid

Methyl 5-(2-[(2,6-diamino-4(3H)-oxopyrimidin-5-yl)thio]ethyl)thiophene-2-carboxylate