You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 5-[3-[(1R,2R,3R,5R)-5-chloro-3-hydroxy-2-(2-pyridin-3-ylethenyl)cyclopentyl]propyl]thiophene-2-carboxylic acid into its molecular formula.
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C20H22ClNO3S
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