(1Z)-6-{[(2R)-2-{[(2R)-3-{[(5Z)-6-({[(1S)-2,2-dimethylcyclopropyl]carbonyl}amino)-6-carboxyhex-5-enyl](oxo)-λ4-sulfanyl}-2-aminopropanoyl]amino}-2-carboxyethyl](oxo)-λ4-sulfanyl}-1-({[(1S)-2,2-dimethylcyclopropyl]carbonyl}amino)hex-1-ene-1-carboxylic acid