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 (3R)-3-[2-fluoro-5-(7-methoxy-1H-indol-2-yl)phenyl]-3,6,6-trimethyl-1-methylidene-1-oxo-2H-1,4-thiazin-5-amine into molecular formula.
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C23H26FN3O2S
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