You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(1R)-1-(5-chloropyridin-2-yl)-1-[3-fluoro-5-(trifluoromethyl)phenyl]-2-phenylethyl]-3-[1-(hydroxymethyl)cyclopentyl]urea The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H26ClF4N3O2
assistant