You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[1-(3,4-difluorophenyl)ethyl]-3-(4,5-diphenyl-1,3-oxazol-2-yl)propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H22F2N2O2
assistant