You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[[4-[1,1-bis[4-[[3,5-bis(phenylmethoxy)phenyl]methoxy]phenyl]ethyl]phenoxy]methyl]-3,5-bis(phenylmethoxy)benzene is the IUPAC name of a molecule. Please give its molecular formula.
user
C83H72O9
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