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                (14R,14aR)-13-tert-butyl-14-methyl-1,2,3,5,6,7,8,14,14a-nonahydro-3-oxo-2-hydroxy-6-(2-nitrobenzenesulfonyl)benzo[7,8]azonino[5,4-b]indole-13,14(1H)-dicarboxylate
             
             
         
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                (14R,14aR)-13-tert-butyl-14-methyl-1,2,3,5,6,7,8,14,14a-nonahydro-3-oxo-6-(2-nitrobenzenesulfonyl)benzo[7,8]azonino[5,4-b]indole-13,14(1H)-dicarboxylate