You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (3Z)-1-[(3,4-dichlorophenyl)methyl]-3-[(3,5-dimethyl-1H-pyrrol-2-yl)methylidene]-5-nitroindol-2-one .
user
C22H17Cl2N3O3
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