You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (Z)-7-[(1R,2S,3R,5S)-3-methyl-2-(3-methylbutyl)-5-trimethylsilyloxycyclopentyl]hept-5-enoic acid into its molecular formula.
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C21H40O3Si
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