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The total synthesis features effective use of the original chiral building block prepared by us and a series of highly stereoselective reactions, i.e., hydroxy-directed hydrogenation, [4 + 2] cycloaddition of a sterically hindered dienophile, reduction of ketones, formation of the C9 side-chain diene, and formation of the THF moiety bearing two acetyloxy groups."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380004233249805440","@type":"Researcher","foaf:name":[{"@value":"Kenji Usui"}],"jpcoar:affiliationName":[{"@value":"Department of Chemistry and\rBiochemistry, Faculty of Science and Engineering, Waseda University 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004233249805441","@type":"Researcher","foaf:name":[{"@value":"Misaki Kanbe"}],"jpcoar:affiliationName":[{"@value":"Department of Chemistry and\rBiochemistry, Faculty of Science and Engineering, Waseda University 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, 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