You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[1-[2-[[2-[3-[[1-[2-cyclohexyl-2-[2-(methylamino)propanoylamino]acetyl]pyrrolidin-2-yl]methyl]-6-fluoro-1H-indol-2-yl]-5-fluorobenzimidazol-1-yl]methyl]pyrrolidin-1-yl]-1-oxobutan-2-yl]-2-(methylamino)propanamide by IUPAC nomenclature, provide its molecular formula.
user
C45H61F2N9O4
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