You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(3-aminopropylsulfonyl)-1,3,4,7,8,8a-hexahydropyrrolo[1,2-a]pyrazin-6-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C10H19N3O3S
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