(3S,6S,9S,12S)-1-((S)-1-((2S,3S)-2-((S)-2-((S)-2-((R)-2-amino-3-phenylpropanamido)-4-carboxybutanamido)-4-carboxybutanamido)-3-methylpentanoyl)pyrrolidin-2-yl)-3,6-bis(2-carboxyethyl)-9-(4-hydroxybenzyl)-12-isobutyl-1,4,7,10-tetraoxo-2,5,8,11-tetraazatridecan-13-oic acid.
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