You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name ethyl 5-[2-[3-(1,3-benzodioxol-5-yl)prop-2-enoyloxy]acetyl]-2,4-dimethyl-1H-pyrrole-3-carboxylate ?
user
C21H21NO7
assistant