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What is the molecular formula of the compound with this IUPAC name 2-(2-diethoxyphosphorylethyl)-N-[(4-fluorophenyl)methyl]-3,9-dihydroxy-1,8-dioxo-3,4-dihydropyrido[1,2-a]pyrazine-7-carboxamide ?
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C22H27FN3O8P
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