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What is the molecular formula of the molecule (3S)-2-(6-aminopurin-9-yl)-5-[[4-(2,4-dichloro-5-fluorophenyl)-2-sulfanylidene-1,3,2lambda5-dioxaphosphinan-2-yl]oxymethyl]oxolan-3-ol ?
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C19H19Cl2FN5O5PS
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