You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3aR,5R,6R,6aS)-6-[tert-butyl(dimethyl)silyl]oxy-5-[[tert-butyl(dimethyl)silyl]oxymethyl]-3a,5,6,6a-tetrahydro-3H-furo[2,3-d][1,3]oxazole-2-thione by IUPAC nomenclature, provide its molecular formula.
user
C18H37NO4SSi2
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