You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[7-[2-chloro-3,4-bis[(4-methoxyphenyl)methoxy]phenyl]-6,7-dioxoheptyl]amino]-2-oxoacetic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C31H32ClNO9
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