You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(2-amino-2-methylpropyl)-5-N-[4-[(2-chloro-4-fluorobenzoyl)amino]phenyl]-1,3-oxazole-4,5-dicarboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H21ClFN5O4
assistant