苯基氰胺

5-amino-1-[3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]imidazole-4-carbonitrile

6-methythio-2-phenylamino-9-(β-D-ribofuranosyl)purine

2,4,6-triimino-1,3,5-triphenyl-hexahydro-1,3,5-triazine

ethyl 5-amino-1-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-1H-imidazole-4-carbimidate