You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named methanesulfonic acid;2-[4-(4-methoxyphenoxy)phenoxy]-5-[4-[[4-(4-methylbenzoyl)phenoxy]methyl]-3-(trioxidanylsulfanyl)benzoyl]benzenesulfonic acid by IUPAC nomenclature, provide its molecular formula.
user
C43H40O18S4
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