(4R,5S,6S)-3-[[(3S,5S)-5-[[(3-羧基苯基)氨基]羰基]-1-[[(4R,5S,6S)-3-[[(3S,5S)-5-[[(3-羧基苯基)氨基]羰基]-3-吡咯烷基]硫基]-6-[(1R)-1-羟基乙基]-4-甲基-7-氧代-1-氮杂双环[3.2.0]庚-2-烯-2-基]羰基]-3-吡咯烷基]硫基]-6-[(1R)-1-羟基乙基]-4-甲基-7-氧代-1-氮杂双环[3.2.0]庚-2-烯-2-羧酸

(4R,5S,6S)-3-[[(3S,5S)-5-[[(3-Carboxyphenyl)amino]carbonyl]-1-[[(4R,5S,6S)-3-[[(3S,5S)-5-[[(3-carboxyphenyl)amino]carbonyl]-3-pyrrolidinyl]thio]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-en-2-yl]carbonyl]-3-pyrrolidinyl]thio]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid