(4S,5β)-6β-[(R)-1-Hydroxyethyl]-4α-methyl-3-[[1-(2-chloro-2-propenyl)-pyridinium 4-yl]thiomethyl]-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate | (4S,5β)-6β-[(R)-1-Hydroxyethyl]-4α-methyl-3-[[1-(2-chloro-2-propenyl)-pyridinium 4-yl]thiomethyl]-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate | |