5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 7-((5-amino-5-carboxy-1-oxopentyl)amino)-3-(((3-(3,4-dihydroxyphenyl)-2-methoxy-1-oxo-2-propenyl)oxy)methyl)-7-methoxy-8-oxo-, (6R-(6 alpha,7 alpha,7(R*)))-