9-乙基-6-巯嘌呤

4-oxo-2-sulfanylidene-5,6,7,8-tetrahydro-1H-quinazoline-6-carboxylic acid

diethyl 2-amino-1,3-thiazole-4,5-dicarboxylate

4-(1,3-苯并噻唑-2-基)-1,3-噻唑-2-胺

3-methyl-2,4-dihydropyrazolo[4,3-d]pyrimidine-7-thione