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咖啡因
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1,3,7-trimethylpteridine-2,4(1h,3h)-dione
10381-82-5
8-bromo-1,3,7-trimethylpurine-2,6-dione
5415-41-8
8-iodo-1,3,7-trimethyl-3,7-dihydro-purine-2,6-dione