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(3R,5R,6R,12S,12aS)-2,2,2-trichloroethyl 7-(benzyloxy)-3-[6-(benzyloxy)-7-methylbenzo[d][1,3]dioxol-4-yl]-5-{[(tert-butyldimethylsilyl)oxy]methyl}-8-methoxy-9-methyl-3,5,6,11,12,12a-hexahydro-2H-6,12-epiminobenzo[e]oxazolo[3,2-a]azocine-13-carboxylate
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(4aR,5R,6S,12R,12aR)-8-bromo-5-hydroxy-10,11-dimethoxy-9-methyl-13-tosyl-4a,5,6,7,12,12a-hexahydro-3H-6,12-epiminobenzo[4,5]cycloocta[1,2-b][1,4]oxazin-3-one
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