You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3S)-N-ethyl-6-(1H-imidazol-2-yl)-N-propyl-3,4-dihydro-2H-chromen-3-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H23N3O
assistant