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(2007/10/02)8-bromo-1,3-dimethyl-7-(2-oxo-2-phenylethyl)-3,7-dihydro-1H-purine-2,6-dione
8-bromo-3-methyl-7-phenacylmethylxanthine
1-Methyl-7-phenyl-1H-oxazolo[2,3-f]purine-2,4-dione
methyl iodide
1,3,8-trimethyl-7-phenyl-1H,8H-imidazo[2,1-f]purine-2,4-dione
2-phenyl-6,8-dimethylthiazolo<3,2-f>xanthine
3-bromo-2-phenyl-6,8-dimethyloxazolo<3,2-f>xanthine
7-phenacyl-8-N-morpholino-1,3-dimethylxanthine
7-phenacyl-8-N-piperidino-1,3-dimethylxanthine