(6R,7S)-7α-[(4-Carboxy-1-oxobutyl)amino]-3-[[[(E)-3-(4-hydroxyphenyl)-1-oxo-2-propenyl]oxy]methyl]-7-methoxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid [ 80458-10-2 ]