You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule N-[(1R)-1-(2,5-difluorophenyl)ethyl]-N-[2-[[(2S)-1'-methyl-2',4'-dioxospiro[1,3-dihydroindene-2,5'-imidazolidine]-5-yl]amino]-2-oxoethyl]-1-(trifluoromethyl)cyclopropane-1-carboxamide ?
user
C27H25F5N4O4
assistant