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What is the molecular formula of the compound with this IUPAC name (2S,4aS)-2'-amino-7-(5-chloropyridin-3-yl)-2-ethoxy-3'-methylspiro[1,2,3,4,4a,9a-hexahydroxanthene-9,5'-imidazole]-4'-one ?
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C23H25ClN4O3
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