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  • 4-oxo-pentanoic acid 2-[4-acetoxy-2-benzyloxymethyl-6-p-tolylsulfanyl-5-(2,2,2-trichloro-ethoxycarbonylamino)-tetrahydro-pyran-3-yloxy]-5-benzyloxy-6-benzyloxymethyl-4-(4-methoxy-benzyloxy)-tetrahydro-pyran-3-yl ester

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