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 cyclopent-3-en-1-yl-(2-methyl-3,3a,4,5,6,6a-hexahydro-2H-pyrrolo[2,3-c]pyrrol-1-yl)methanone .
user
C13H20N2O
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