You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[5-(4-fluoro-2-methylphenyl)-4-methyl-3-phenylpyrazol-1-yl]-1,3-thiazole-4-carboxylic acid into molecular formula.
user
C21H16FN3O2S
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