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methyl (6S,9R,12S,13S)-9-((1H-indol-3-yl)methyl)-13-methoxy-2,2,6,8-tetramethyl-4,7,10-trioxo-12-(p-tolyl)-3-oxa-5,8,11-triazatetradecan-14-oate
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methyl (6S,9R,12S,13S)-9-((1H-indol-3-yl)methyl)-13-methoxy-12-(4-methoxyphenyl)-2,2,6,8-tetramethyl-4,7,10-trioxo-3-oxa-5,8,11-triazatetradecan-14-oate
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methyl (6S,9R,12S,13S)-9-((1H-indol-3-yl)methyl)-13-methoxy-2,2,6,8-tetramethyl-12-(4-nitrophenyl)-4,7,10-trioxo-3-oxa-5,8,11-triazatetradecan-14-oate
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methyl (6S,9R,12S,13S)-9-((1H-indol-3-yl)methyl)-12-([1,1'-biphenyl]-4-yl)-13-methoxy-2,2,6,8-tetramethyl-4,7,10-trioxo-3-oxa-5,8,11-triazatetradecan-14-oate
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methyl (6S,9R,12S,13S)-9-((1H-indol-3-yl)methyl)-12-(4-carbamoylphenyl)-13-methoxy-2,2,6,8-tetramethyl-4,7,10-trioxo-3-oxa-5,8,11-triazatetradecan-14-oate