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 ethyl 5-[[4-[4-[(4-ethoxycarbonyl-5-oxo-4-pentyloxolan-2-yl)methylsulfanylmethyl]phenyl]phenyl]methylsulfanylmethyl]-2-oxo-3-pentyloxolane-3-carboxylate .
user
C40H54O8S2
assistant