You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule tert-butyl N-[3-fluoro-2-[(3-oxo-1,2-dihydroinden-5-yl)oxymethyl]prop-2-enyl]carbamate into molecular formula.
user
C18H22FNO4
assistant