You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(3aS,6aR)-2-oxo-3a,4,6,6a-tetrahydro-3H-pyrrolo[3,4-d][1,3]oxazol-5-yl]-6-(3,3-difluorocyclobutyl)oxyquinoline-7-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H18F2N4O4
assistant