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 (2R)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-[[(2R)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-oxo-3-pyrrolidin-1-ylpropyl]disulfanyl]propanoic acid is given. What is its corresponding molecular formula?
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C20H35N3O7S2
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