You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[(6S)-6-(3-chloro-2,6-difluorophenyl)-2-methyl-3-sulfanylidene-6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-1-yl]-N-cyclohexylacetamide into its molecular formula.
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C21H24ClF2N3OS
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