(6R,7R)-(Z)-2-(2-amino-4-thiazolyl-2-(methoxyimino)acetamido)-3-(azidomethyl)-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid sodium salt
(6r,7r)-(z)-2-(2-amino-4-thiazolyl-2-(methoxyimino)acetamido)-3-(azidomethyl)-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid sodium salt