You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-(2,3-dihydro-1,4-benzodioxin-3-ylmethyl)-N'-(3,4-dihydro-1H-isochromen-1-ylmethyl)oxamide .
user
C21H22N2O5
assistant