5-[4-[N-(2-Pyridylamino)ethoxy]benzylidene]thiazolidine-2,4-dione

5-[[4-[2-(2-Pyridinylamino)ethoxy]phenyl]methylene]-2,4-thiazolidinedione

Rosiglitazone Impurity (5-[4-N-(2-Pyridylamino)ethoxy]benzylidene] thiazolidine-2,4-dione)