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 (3S,4S)-1-(1,3,4,5,7,8,9,9a-octahydropyrrolo[1,2-a][1,4]diazepine-2-carbonyl)-4-methylpyrrolidine-3-carboxylic acid .
user
C15H25N3O3
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