You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(1R)-2-acetyl-1H-isoquinolin-1-yl]-1-[(2S)-2-(4-methoxyphenyl)azepan-1-yl]ethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H30N2O3
assistant