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Convert the IUPAC name of a molecule 2-(benzenesulfonyl)ethyl (5R,8Z,12S)-21-oxa-13-azapentacyclo[10.9.0.01,20.05,20.014,19]henicosa-8,14,16,18-tetraen-6,10-diyne-13-carboxylate into molecular formula.
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C28H23NO5S
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