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  • Acetic acid (E)-(1S,2R)-1-(4-methoxy-benzyloxymethyl)-2-methyl-4-methylene-7-{(2R,3R)-3-[1-((2R,3R)-3-trimethylsilanylethynyl-1,4-dioxa-spiro[4.4]non-2-yl)-vinyl]-1,4-dioxa-spiro[4.4]non-2-yl}-hept-6-enyl ester

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