You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-ethyl-N-[2-[[(1S)-1-(3-fluoropyridin-2-yl)ethyl]amino]-2-oxoethyl]prop-2-enamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H18FN3O2
assistant