1-Azabicyclo(3.2.0)hept-2-ene-2-carboxylic acid, 3-((2-((3-((2,4-dihydroxy-3,3-dimethyl-1-oxobutyl)amino)-1-oxopropyl)amino)ethyl)thio)-6-ethyl-7-oxo-, (5R-(3(R*),5alpha,6beta))-
1-azabicyclo(3.2.0)hept-2-ene-2-carboxylic acid, 3-((2-((3-((2,4-dihydroxy-3,3-dimethyl-1-oxobutyl)amino)-1-oxopropyl)amino)ethyl)thio)-6-ethyl-7-oxo-, (5r-(3(r*),5alpha,6beta))-