Aztreonam USP RC E

Chemical Name: Aztreonam USP Impurity E l Aztreonam E-Isomer ; (E)-2-({[(2-Amino-4-thiazolyl){[(2S,3S)-2-methyl-4-oxo-1-sulfo-3-azetidinyl]carbamoyl}methylene]amino}oxy)-2-methylpropionic acid