You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[[4-[[3-[3-[[4-(butylaminomethyl)-2-chlorophenoxy]methyl]-2-methylphenyl]-2-methylphenyl]methoxy]-3-chlorophenyl]methylamino]butanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C38H44Cl2N2O4
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