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 3-(2,4-dimethylphenyl)-4-[4-(3-methylphenyl)piperazin-1-yl]-1-propylpyrrole-2,5-dione .
user
C26H31N3O2
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