You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (5Z)-5-[(3aR,6aS)-6-[(E,3R)-3-hydroxyoct-1-enyl]-3,3a,4,6a-tetrahydro-1H-pentalen-2-ylidene]pentanoic acid into its molecular formula.
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C21H32O3
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