You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(4-chlorophenyl)-2-(2-methoxyethyl)-1-oxospiro[4H-isoquinoline-3,1'-cyclohexane]-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H27ClN2O3
assistant