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2-[(1S,5S,6S,7S,8S,12S)-7,11,14,14-Tetramethyl-3,9-dioxo-8-triethylsilyloxy-12-tri(propan-2-yl)silyloxy-2,4-dioxatricyclo[8.3.1.01,5]tetradec-10-en-6-yl]prop-2-enal


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