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system
Name the molecular formula for the molecule established as methyl (4S)-4-(2-chloro-4-fluorophenyl)-6-piperidin-4-yl-2-(1,3-thiazol-2-yl)-1,4-dihydropyrimidine-5-carboxylate using the IUPAC nomenclature.
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C20H20ClFN4O2S
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