You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (1R,3aR,5aS,7S,9aS)-7-[tert-butyl(dimethyl)silyl]oxyspiro[1,2,3,3a,5,5a,6,7-octahydrocyclopenta[i]indene-4,2'-1,3-dithiane]-1-ol into its molecular formula.
user
C21H36O2S2Si
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