(4R,5S,6S)-3-[[(3S,5S)-1-[3-[[[(2S,4S)-4-[[(4R,5S,6S)-2-Carboxy-6-[(1R)-1-hydroxyethyl]-4-Methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-en-3-yl]thio]-2-pyrrolidinyl]carbonyl]aMino]benzoyl]-5-[[(3-carboxyphenyl)aMino]carbonyl]-3-pyrrolidinyl]thio]-6-[(1R)-1-hydro