You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-3-(2,3-dihydro-1-benzofuran-5-yl)-1-[(3S,5S)-3,5-dimethylpiperidin-1-yl]prop-2-en-1-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H23NO2
assistant