You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(1R)-1-[(1R)-2-benzyl-6,7-dimethoxy-3,4-dihydro-1H-isoquinolin-1-yl]ethyl]-3-chlorobenzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H29ClN2O3
assistant