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 1-[(3aS,8aR)-2,3,3a,4,5,7,8,8a-octahydro-1H-pyrrolo[3,4-d]azepin-6-yl]-2-[5-(4-chlorophenyl)tetrazol-2-yl]ethanone .
user
C17H21ClN6O
assistant