You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule methyl 2-[(1R,3S,3aS,6aS)-5-benzyl-4,6-dioxo-3-phenyl-2,3,3a,6a-tetrahydro-1H-pyrrolo[3,4-c]pyrrol-1-yl]acetate ?
user
C22H22N2O4
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