6EK 6ek (2S,3S)-2-{[(2S)-3-(2-amino-1H-imidazol-5-yl)-2-{[(2S,4S)-5-(carbamoyloxy)-4-hydroxy-2-({[(2S,3S)-3-hydroxypiperidin-2-yl]carbonyl}amino)pentanoyl]amino}propanoyl]amino}-3-(2-chloro-1H-imidazol-5-yl)-3-hydroxypropanoic acid 6EK