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8-[(2-hydroxyethyl)amino]-3-methyl-7-(2-methylprop-2-en-1-yl)-2,3,6,7-tetrahydro-1H-purine-2,6-dione
8-[(4-Benzylpiperazin-1-yl)methyl]-1,3-dimethyl-7-(2-morpholin-4-ylethyl)purine-2,6-dione
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