Erythromycin Impurity

(6R,7S)-7-[[(2R)-2-[[(4-Ethyl-2,3-dioxo-1-piperazinyl)carbonyl]aMino]-2-(4-hydroxyphenyl)acetyl]aMino]-3-[[(1-Methyl-1H-tetrazol-5-yl)thio]Methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid

5,10-Dihydro-2-methyl-

Cefpodoxime proxetil

CEFATHIAMIDINE