You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[3-[[3-[(1R)-1,2-dimethoxy-2-methylpropyl]-4-(2-fluoro-5-methoxyphenyl)phenyl]methoxy]-2-fluorophenyl]pentanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H36F2O6
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