You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[3-ethoxy-4-[9-[2-ethoxy-4-[1-(2-methylprop-2-enoyloxy)ethoxy]-3-propylphenyl]fluoren-9-yl]-2-propylphenoxy]ethyl 2-methylprop-2-enoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C47H54O8
assistant