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  • (2R,4S,1'''S,5'''R,7'''R,4''''R)-Spiro{4-[6'-(1''-ethoxyethoxy)-2'-oxohexyl]-1,3-dioxane-2,8'''-[7'''-(2'''',2''''-dimethyl-1'''',3''''-dioxolan-4''''-yl)-3''',3'''-dimethyl-2''',4''',6'''-trioxabicyclo[3.3.0]octane]}

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