You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (4S)-1-benzyl-5-butyl-4-[tert-butyl(dimethyl)silyl]oxy-5-hydroxypyrrolidin-2-one is given. What is its corresponding molecular formula?
user
C21H35NO3Si
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