You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named [1-(3,5-difluorophenyl)-3-hydroxy-4-[(2-hydroxy-2-phenylethyl)amino]butan-2-yl]carbamic acid by IUPAC nomenclature, provide its molecular formula.
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C19H22F2N2O4
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