You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule S-[5-[(3S,9S,12R)-3,3'-dimethyl-2,5,8,11-tetraoxospiro[1,4,7,10-tetrazabicyclo[10.3.0]pentadecane-6,1'-cyclohexane]-9-yl]pentyl] ethanethioate into molecular formula.
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C25H40N4O5S
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