You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[2-(2-ethylquinolin-4-yl)-3,4-dihydro-1H-isoquinolin-5-yl]-1,3-oxazolidin-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H23N3O2
assistant