You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 2-[(2R,3aR,9aS)-2-benzyl-5-oxo-3,3a,4,6,7,8,9,9a-octahydro-2H-pyrrolo[3,2-b]azocin-1-yl]-N-(1,3-dimethylpyrazol-4-yl)acetamide ?
user
C23H31N5O2
assistant