You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 4-[(3,3-difluorocyclobutyl)-[[6-[4-(trifluoromethyl)imidazol-1-yl]pyridin-3-yl]amino]methyl]benzoic acid .
user
C21H17F5N4O2
assistant