(3-ACETYL-2-METHYL-5-OXO-2-PYRROLIN-4-YL)ACETIC ACID

2-(4-ACETYL-5-METHYL-2-OXO-2,3-DIHYDRO-1H-PYRROL-3-YL)ACETIC ACID

2-(4-ACETYL-2,3-DIHYDRO-5-METHYL-2-OXO-1H-PYRROL-3-YL)ACETIC ACID