You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [2-[(1S,2S,5R)-5-methyl-2-propan-2-ylcyclohexyl]oxy-2-oxoethyl] 4-oxo-4-thiophen-2-ylbutanoate into its molecular formula.
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C20H28O5S
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