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3-methyl-6-(5-hydroxy-3-(methylmercapto)-2-penten-2-yl)-5,6-dihydropyrimido[4,5-d]pyrimidine
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N-[(4-amino-2-methylpyrimidin-5-yl)methyl]-N-(5-hydroxy-3-(methylmercapto)-2-penten-2-yl)formamide