You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-[5-[(6,7-dimethoxy-2-methyl-3,4-dihydro-1H-isoquinolin-1-yl)methyl]-2,3-dimethoxyphenoxy]-1-[(3,4-dimethoxyphenyl)methyl]-5,6-dimethoxy-2-methyl-3,4-dihydro-1H-isoquinoline The above is the IUPAC name of a molecule. Write its molecular formula.
user
C42H52N2O9
assistant