You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-(1,3-dioxolan-2-yl)piperidin-1-yl]-1-[4-(2-fluorophenyl)piperazin-1-yl]ethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H28FN3O3
assistant