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tert-butyl ((R)-2-((tert-butoxycarbonyl)amino)-3-hydroxy-3-methylbutanoyl)((4S,10R,13S,16R,Z)-4,10,13-triisopropyl-2,16,20-trimethyl-6,9,12,15,18-pentaoxo-7-(propan-2-ylidene)-2,5,8,11,14,17-hexaazadocos-19-en-19-yl)carbamate
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tert-butyl ((4S,10R,13S,16R)-4,10,13-triisopropyl-2-methyl-6,9,12,15-tetraoxo-7-(propan-2-ylidene)-2,5,8,11,14-pentaazaheptadecan-16-yl)carbamate