You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[(1S)-1-cyclohexyl-2-[[(2S)-3-[(2S,3S)-2-[[3-(cyclopropylamino)-2,3-dioxopropyl]carbamoyl]-3,4-dimethylpyrrolidin-1-yl]butan-2-yl]amino]-2-oxoethyl]pyrazine-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C30H45N7O5
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