(4S,7S,10S,13S)-4-((S)-sec-butyl)-7-(2-carboxyethyl)-13-((4-(chloromethyl)-2-oxo-2H-chromen-7-yl)carbamoyl)-10-((R)-1-hydroxyethyl)-2,5,8,11-tetraoxo-3,6,9,12-tetraazapentadecan-15-oic acid