You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-(6,7-dimethoxy-3,4-dihydro-1H-isoquinolin-2-yl)-2-oxoethyl] 2,3,4,5,6-pentamethylbenzoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H31NO5
assistant