(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-phenylacetic acid

phenazine 5-oxide penicilline precursor ; (r)-α-[[(4-ethyl-2,3-dioxopiperazino)carbonyl]amino]benzeneacetic acid ; piperacillin ep impurity g ; -[(4-ethyl-2,3-dioxo-1-piperazinyl)formamido]phenylaceticacid ; a-(((4-ethyl-2,3-dioxo-1-piperazimyl)formamido) phenylacetic acid ; α-(((4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl)amino)benzeneacetic acid ; epcp ; (r)-[[(4-ethyl-2,3-dioxopiperazin-1-yl)carbonyl]amino]phenylacetic acid ; 2r-2((4-ethyl-2,3-dioxypiperazyl)formamide)phenyl acetic acid ; (r)-2-(4-ethyl-2,3-dioxopiperazine-1-carboxamido)-2-phenylacetic acid