8-(Ethylthio)-2-thiotheophylline

8-(Ethylthio)-xanthine

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

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

8-(Hexylthio)-2-thio-theophylline

8-(Hexylthio)-3, 9-dihydro-1, 3-dimethyl-1H-purine-2, 6-dithione

8-(Hydroxy(oxido)amino)-6-methyl(1, 2, 4)triazolo(4, 3-c)pyrimidine-5, 7(1H, 6H)-dione

8-(Hydroxy(oxido)amino)thiopyrano(4, 3-b)indole

8-(Hydroxymethyl)-6, 11-dimethyl-4H-(1, 3)oxazolo(5, 4, 3-ij)pyrido(3, 2-g)quinoline-4, 10(11H)-dione

8-(Hydroxymethyl)theophylline

8-(Methylsulfonyl)fad

8-(Methylsulfonylamino)quinoline

8-(Methylthio)cyclic 3', 5'-adenosine monophosphate

8-(Methylthio)purine

8-(N, N-diethylamino)octyl-3, 4, 5-trimethoxybenzoate

8-(N, N-Diethylaminocarbonyl)-N11-ethyl-N6-methyl-6, 11-dihydro-5H-pyrido(2, 3-b)(1, 5)benzodiazepin-5-one

8-(N, N-Dimethyl)mitozolomide

8-(N-(t-Butylcarbonyl)aminomethyl)-N11-ethyl-N6-methyl-6, 11-dihydro-5H-pyrido(2, 3-b)(1, 5)benzodiazepin-5-one

8-(N-Fluoren-2-ylacetamido)-2'-deoxyguanosine 5'-monophosphate

8-(N-Fluoren-2-ylamino)-2'-deoxyguanosine 5'-monophosphate