You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named tert-butyl (4S)-4-[[(2S)-2-[[(2R)-2-amino-3-methyl-3-methylsulfanylbutanoyl]amino]-3-(4-tert-butylphenyl)propanoyl]amino]-6-[[(2R)-1-amino-6-[(2-methylpropan-2-yl)oxycarbonylamino]-1-oxohexan-2-yl]amino]-6-oxohexanoate by IUPAC nomenclature, provide its molecular formula.
user
C40H68N6O8S
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