英文别名2-(2-(4-((2,4-Dioxothiazolidin-5-yl)methyl)phenoxy)ethyl)-5-ethylpyridine 1-oxide; 5-[[4-[2-(5-Ethyl-2-pyridinyl]ethoxy]phenyl]methyl]-2,4-thiazolidinedione N-Oxide; Pioglitazone Impurity 20; Pioglitazone Nitrogen Oxide Impurity; 2,4-Thiazolidinedione, 5-[[4-[2-(5-ethyl-1-oxido-2-pyridinyl)ethoxy]phenyl]methyl]-; 5-{4-[2-(5-Ethyl-1-oxido-2-pyridinyl)ethoxy]benzyl}-1,3-thiazolidine-2,4-dione; 5-[[4-[2-(5-ethyl-1-oxidopyridin-1-ium-2-yl)ethoxy]phenyl]methyl]-1,3-thiazolidine-2,4-dione 
