You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl [4-[(Z)-[2-(4-fluorophenyl)-5-oxo-1,3-oxazol-4-ylidene]methyl]-2-methoxyphenyl] carbonate is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H20FNO6
assistant