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 (3aR,6aR)-2-(oxan-4-ylmethyl)-5-phenyl-3,3a,6,6a-tetrahydro-1H-pyrrolo[3,4-c]pyrrol-4-one ?
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C18H24N2O2
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