You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[3-[3-[2-(2-ethyl-4-prop-2-enoyloxyphenyl)-5-(4-prop-2-enoyloxyphenyl)phenyl]-4-methoxyphenyl]-2-oxochromen-7-yl] 2,2-dimethylpropanoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C47H40O9
assistant