You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 4-[[6,7-dimethoxy-2-(2-thiophen-2-ylacetyl)-3,4-dihydro-1H-isoquinolin-1-yl]methoxy]benzoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H27NO6S
assistant