You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance bis[5-(3,4-dihydro-1H-isoquinolin-2-yl)-6,7-dimethoxy-3-methyl-2-phenyl-5H-1,6-naphthyridin-4-yl]methanone .
user
C53H52N6O5
assistant