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(3As,4R,6R,7R,7aR)-6-[4-[[(3aS,4R,6R,7R,7aR)-7-hydroxy-2-oxo-4-(phenylmethoxymethyl)-4,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran-6-yl]oxy]but-2-ynoxy]-7-hydroxy-4-(phenylmethoxymethyl)-4,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran-2-one


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