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[(3R,4S,5S,6R)-5-[[(3As,4R,6S,7R,7aS)-7-acetyloxy-4-ethyl-2-oxo-4,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran-6-yl]oxy]-2-acetyloxy-6-ethyl-4-methyloxan-3-yl] acetate


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