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 benzyl 5-oxo-7-prop-2-enyl-3,4,9,9a-tetrahydro-1H-pyrrolo[1,2-a][1,4]diazepine-2-carboxylate .
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C19H22N2O3
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