头孢唑林钠杂质  Cefazolin Sodium impurity

TBL-C  (6R,7R)-7-(2-(1H-tetrazol-1yl)acetamido)-3-methyl-8-oxo-5-thia-1azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid  56842-77-4

TBL-D  (6R,7R)-7-(2-(1H-tetrazol-1yl)acetamido)-3-(acetoxymethyl)-8-oxo5-thia-1-azabicyclo[4.2.0]oct-2-ene-2carboxylic acid  32510-61-5