2-N-(5-[[4-(2-METHYL-2-PYRIDINYLAMINO) ETHOXY] PHENYL]METHYL]-2,4-THIAZOLIDINEDIONE) BUTANEDIOIC ACID, METHODS OF PREPARATION AND COMPOSITIONS WITH ROSIGLITAZONE MALEATE
Disclosed is an isolated compound of the formula (I) along with methods of detecting it and of minimizing it in improved pharmaceutical compositions of rosiglitazone maleate.