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  • (1S,3R,4R,5S)-3-((R)-1-{(4R,5R,6S)-6-[(S)-but-3-yn-2-yl]-2,2,5-trimethyl-1,3-dioxan-4-yl}ethyl)-1,4-dimethyl-2,8-dioxabicyclo-[3.2.1]octane

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