(5R)-3-[[4-Methyl-1-(1-iminoethyl)piperidin-4-yl]thio]-6β-[(R)-1-hydroxyethyl]-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid | (5R)-3-[[4-Methyl-1-(1-iminoethyl)piperidin-4-yl]thio]-6β-[(R)-1-hydroxyethyl]-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid | |