You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (2S,4R)-4-[2-[3-amino-5-[2-[(3R,5S)-1-[(2S)-3,3-dimethyl-2-[[(2S)-2-(methylamino)propanoyl]amino]butanoyl]-5-(2,2-diphenylethylcarbamoyl)pyrrolidin-3-yl]acetyl]phenyl]-2-oxoethyl]-1-[(2S)-3,3-dimethyl-2-[[(2S)-2-(methylamino)propanoyl]amino]butanoyl]-N-(2,2-diphenylethyl)pyrrolidine-2-carboxamide is given. What is its corresponding molecular formula?
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C68H87N9O8
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