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 (E,1R)-1-[(2R,3aS,5S,6aS)-2-[(1S)-1-bromopropyl]-2,3,3a,5,6,6a-hexahydrofuro[3,2-b]furan-5-yl]hex-3-en-5-yn-1-ol into molecular formula.
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C15H21BrO3
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