8-(4-Iodophenyl)-9-sulfanylidene-1, 8-diazabicyclo(4.3.0)nonan-7-one

8-(4-Methoxyphenyl)naphtho(2', 1':4, 5)thiazolo(2, 3-C)(1, 2, 4)triazole

8-(4-Methylphenyl)-1, 8-diazabicyclo(4.3.0)nonane-7, 9-dione

8-(4-Nitrobenzoyloxy)-9-hydroxy-8, 9-dihydro-aflatoxin B1

8-(4-Oxo-4-(2-thienyl)butyl)-1-phenyl-1, 3, 8-triazaspiro(4.5)decan-4-one

8-(4-Oxo-4-phenylbutyl)-1-phenyl-1, 3, 8-triazaspiro(4.5)decan-4-one

8-(4-Pyridyl)theophylline

8-(4-Sulfophenyl)theophylline

8-(4-Tolylsulfinyl)-2, 3, 4, 4a, 5, 6, 7, 8-octahydro-4a-quinolinol

8-(4-Tolylsulfonylamino)quinoline

8-(5-Thioacetamidofluorescein)cyclic-GMP

8-(6-Amino-9H-purin-9-yl)-2, 2, 4, 4-tetraisopropyltetrahydro-6H-furo(3, 2-f)(1, 3, 5, 2, 4)trioxadisilocin-9-ylamine

8-(6-Aminohexyl)amino-2'-amp

8-(alpha-Hydroxyisopropyl)adenosine

8-(Benzenesulfonamido)-7-(3-pyridinyl)octanoic acid

8-(Bis(ethoxycarbonylmethyl)amino)-6-methoxy-2-(bis(ethoxycarbonylmethyl)amino)styrylquinoline

8-(Butylthio)-1, 2, 3, 9-tetrahydro-1, 3-dimethyl-2-thioxo-6H-purin-6-one

8-(Butylthio)-1, 3, 6, 9-tetrahydro-1, 3-dimethyl-6-thioxo-2H-purin-2-one

8-(Butylthio)theobromine

8-(Butylthio)xanthine