You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (4E)-4-[[4-[bis(2-chloroethyl)amino]phenyl]methylidene]-1-(3,4-dimethylphenyl)pyrazolidine-3,5-dione .
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C22H23Cl2N3O2
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