6-fluoro-1-methyl-7-(4-((5-methyl-2-oxo-1,3-dioxol-4-yl)methyl)piperazin-1-yl)-4-oxo-1,4-dihydro-[1,3]thiazeto[3,2-a]quinoline-3-carboxylic acid-D8; 6-Fluoro-1-methyl-7-[4-[(5-methyl-2-oxo-1,3-dioxol-4-yl)methyl]-1-(piperazinyl-d8)]-4-oxo-1H,4H-[1,3]thiazeto[3,2-a]quinoline-3-carboxylic Acid; NM 441-d8; Quisnon-d8; Sword-d8;