Ertapenem Dimer Impurity

Chemical Name: (4R,5S,6S)-3-(((3S,5S)-5-((3-carboxyphenyl)carbamoyl)-1-((4R,5S,6S)-3-(((3S,5S)-5-((3-carboxyphenyl)carbamoyl)pyrrolidin-3-yl)thio)-6-((R)-1-hydroxyethyl)-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carbonyl)pyrrolidin-3-yl)thio)-6-((R)-1-hydroxyethyl)-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid