You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule ethyl (2R)-2-[4-[[(2S)-2-[(2-chloroacetyl)amino]-3-ethoxy-1,1,1-trifluoro-3-oxopropan-2-yl]amino]phenyl]-3,3,3-trifluoro-2-hydroxypropanoate into molecular formula.
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C18H19ClF6N2O6
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