You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(5-fluoro-1,2-benzoxazol-3-yl)-1-[4-(oxolan-3-ylmethyl)piperazin-1-yl]ethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H22FN3O3
assistant