You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(3-chloro-4,5-difluorophenyl)-4-[formyl-oxo-[(propan-2-ylamino)methylidene]-lambda6-sulfanyl]-1-methylpyrrole-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H18ClF2N3O3S
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