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What is the molecular formula of the molecule ethyl 1-(11-hydroxy-3,8-dimethyl-4,14-dioxo-5,9,15-trioxatetracyclo[11.2.1.02,6.08,10]hexadec-1(16)-en-12-yl)piperidine-4-carboxylate ?
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C23H31NO8
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