5-nitro-N-phenyl-pyrimidine-4,6-diamine

4-N-methyl-5-nitropyrimidine-4,6-diamine

8-methyl-10H-pyrido[3,2-b]pyrimido[4,5-e][1,4]thiazin-4-ylamine

3-(5,6-diaminopyrimidin-4-yl)-6-hydroxy-5-(hydroxymethyl)-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]oxazole-2-thione

NSC194991