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  • (3S,4aR,4bS,8aS,10aR)-3-((tert-butyldimethylsilyl)oxy)-2,4b,8,8,10a-pentamethyl-3,4,4a,4b,5,6,7,8,8a,9,10,10a-dodecahydrophenanthrene-1-carbaldehyde

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