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 N-[(3aS,4S,6aR)-2-[[3-fluoro-4-(trifluoromethyl)phenyl]methyl]-3,3a,4,5,6,6a-hexahydro-1H-cyclopenta[c]pyrrol-4-yl]acetamide .
user
C17H20F4N2O
assistant