You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-[(7S,8aS)-2-methyl-3,4,6,7,8,8a-hexahydro-1H-pyrrolo[1,2-a]pyrazin-7-yl]-4,5,6,7-tetrahydro-2-benzothiophene-1-carboxamide .
user
C17H25N3OS
assistant