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 3-(7-methoxy-1,3-benzodioxol-5-yl)prop-2-enyl 2-(7-methoxy-1,3-benzodioxol-5-yl)acetate .
user
C21H20O8
assistant