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What is the molecular formula of the compound with this IUPAC name (1'R,4'S,6'R,8'R,10'S)-6'-hydroxy-4',11',11'-trimethylspiro[1,3-dioxolane-2,12'-15-oxa-3-azatetracyclo[8.4.1.01,10.03,8]pentadecane]-2'-one ?
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C18H27NO5
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