You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
benzyl (3S)-4-[[(2S)-1-[[(2S)-6-amino-1-[(2-methylpropan-2-yl)oxy]-3,6-dioxohexan-2-yl]amino]-1-oxopropan-2-yl]-methylamino]-3-[[(2R,5S)-2-benzyl-5-[[(2R,5S)-2,7-dimethyl-5-[[(5S)-5-[methyl-[(2R,5S)-2-methyl-5-[(2-methylpropan-2-yl)oxycarbonylamino]-4-oxo-6-phenylhexanoyl]amino]-4-oxo-6-phenylhexanoyl]amino]-4-oxooctanoyl]amino]-6-methyl-4-oxoheptanoyl]amino]-4-oxobutanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C81H112N8O17
assistant