1-{[(4R,7S,13S,16S)-7-(2-amino-2-oxoethyl)-13-[(2S)-butan-2-yl]-10-[(1R)-1-hydroxyethyl]-16-(4-methoxybenzyl)-20,20-dimethyl-6,9,12,15,18-pentaoxo-1,2-dithia-5,8,11,14,17-pentaazacycloicosan-4-yl]carbonyl}prolyl-L-leucylglycinamide
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