3-(4-methyl-1-piperazinyl)benzoic acid
N'-{2-cyano-9-[2-(dimethylamino)ethyl]-9H-purin-6-yI}-N'-(cyclopentylmethyl)-4-[(4-methyl-1-piperazinyl)methyl]benzohydrazide trifluoroacetate
1,1-dimethylethyl 2-{2-cyano-9-[3-(dimethylamino)propyl]-9H-purin-6-yI}-2-cyclopentyl hydrazinecarboxylate trifluoroacetate
1,1-dimethylethyl 2-{2-cyano-9-[2-(dimethylamino)ethyl]-9H-purin-6-yl}-2-(cyclopentylmethyl)hydrazinecarboxylate trifluoroacetate
6-[1-(cyclopentylmethyl)hydrazino]-9-[2-(dimethylamino)ethyl]-9H-purine-2-carbonitrile trifluoroacetate