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 [(3aS,6aR)-2,3,3a,4,5,6a-hexahydrofuro[2,3-b]furan-4-yl] N-[(2S)-2-hydroxy-3-[(4-methoxyphenyl)sulfonyl-(2-methylpropyl)amino]propyl]carbamate is given. What is its corresponding molecular formula?
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C21H32N2O8S
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