You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[1-[(2-fluorophenyl)methyl]-4-pyrimidin-2-ylazet-1-ium-2-yl]-1,3-oxazole is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H12FN4O+
assistant