You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (2S)-2-[[(2S)-2-hydroxy-2-[4-(trifluoromethyl)phenyl]acetyl]amino]-3-(2-methoxy-5-nitrophenyl)propanoic acid by IUPAC nomenclature, provide its molecular formula.
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C19H17F3N2O7
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