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[(2R,3S,3aR,4aS,7R,8aS,9S,9aR)-3,9-Diacetoxy-2-(2-trityloxy-ethyl)-decahydro-furo[3,2-b]pyrano[2,3-e]pyran-7-yl]-acetic acid methyl ester
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Toluene-4-sulfonic acid 2-[(3aS,4S,5aR,6S,7R,8aR,8bR)-6-methoxymethoxy-2,2-dimethyl-7-(2-trityloxy-ethyl)-hexahydro-[1,3]dioxolo[4,5]furo[2,3-b]pyran-4-yl]-ethyl ester