(6R,7R)-7-AMino-8-oxo-3-vinyl-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid | (6R,7R)-7-Amino-3-ethenyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid |
7-amino-3-ethenyl-8-oxo-, (6R,7R)-5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid | 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,7-amino-3-ethenyl-8-oxo-,(6R,7R)- |