6-chloro-3-methoxy-[N-(1-ethyl)propyl]-pyrazine-2-amine

4-methoxy-2-phenyl-5,7-dihydrothieno<3,4-d>pyrimidine 6,6-dioxide

2,3-dihydro-3-oxo-2-(5-O-acetyl-β-D-ribofuranosyl)pyridazine-4-carbonitrile

O-methyl 2,3-dihydro-3-oxo-2-β-D-ribofuranosylpyridazine-4-carboxamidate

2,3-dihydro-3-oxo-2-β-D-ribofuranosylpyridazine-4-carbonitrile