You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-[2-[[2-[[(1S)-1-(4-fluorophenyl)ethyl]amino]-6-(pyrazin-2-ylamino)pyrimidin-4-yl]amino]ethyl]methanesulfonamide;hydrochloride by IUPAC nomenclature, provide its molecular formula.
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C19H24ClFN8O2S
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