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  • methyl (6S,9R,14S,17R,20R)-14-((R)-5-methoxy-5-oxo-4-(2,2,2-trifluoroacetamido)pentyl)-9-(methoxycarbonyl)-2,2,6,17,20-pentamethyl-4,7,12,15,18-pentaoxo-3-oxa-5,8,13,16,19-pentaazahenicosan-21-oate

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