CAS No:75498-96-3,92636-39-0||Chemical Formula:C16H20N7NaO7S3||Molecular Weight:541.54777||Exact Mass:Mass: 541.04840 sodium (6R,7S)-7-(2-(((S)-2-amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate