You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1'-[(E)-3-(4-chlorophenyl)prop-2-enyl]-N-[(2-fluoropyridin-4-yl)methyl]-6-[2-(trifluoromethoxy)phenyl]spiro[2H-indole-3,4'-piperidine]-1-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C35H31ClF4N4O2
assistant