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 (6-methoxy-3,4-dihydro-1H-isoquinolin-2-yl)-[1-[(2R)-oxolane-2-carbonyl]piperidin-4-yl]methanone .
user
C21H28N2O4
assistant