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[(1S,2S,6R,7S,10R,12S,16S)-16-(Acetyloxymethyl)-5,9-dimethylidene-4,14-dioxo-3,13,15-trioxatetracyclo[8.6.0.02,6.012,16]hexadecan-7-yl] 2-(acetyloxymethyl)prop-2-enoate


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