You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-[3-(2,2-dimethylpropylsulfanyl)-1-[[4-(6-ethoxypyridin-3-yl)phenyl]methyl]-5-[(5-methylpyridin-2-yl)methoxy]indol-2-yl]-2,2-dimethylpropanoic acid by IUPAC nomenclature, provide its molecular formula.
user
C39H45N3O4S
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