You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named methyl (2S)-2-[[(2S)-2-[[(2S,3S)-2-[[(2S)-2-[[2-[amino-[(2S)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-phenylpropanoyl]amino]acetyl]amino]-3-phenylpropanoyl]amino]-3-methylpentanoyl]amino]-3-phenylpropanoyl]amino]-3-phenylpropanoate by IUPAC nomenclature, provide its molecular formula.
user
C50H63N7O9
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