英文同义词: | Cephalexin sodium impurity VI;2-(3,6-dioxo-5-phenylpiperazin-2-yl)-5-methyl-5,6-dihydro-2H-1,3-thiazine-4-carboxylic acid;Δ4-Cephalexin Diketopiperazine (Technical Grade);Cefalexin Diketopiperazine Delta-3 Isomer;2H-1,3-Thiazine-4-carboxylic acid, 2-(3,6-dioxo-5-phenyl-2-piperazinyl)-5,6-dihydro-5-methyl- |