Synonyms: | 1,4-bis(2,6-dimethylphenyl)piperazine-2,5-dione;Lidocaine Impurity 2;Lidocaine-018;Lidocaine Impurity 20;Lidocaine impurity 23/1,4-Bis(2,6-dimethylphenyl)-2,5-piperazinedione;2,5-Piperazinedione, 1,4-bis(2,6-dimethylphenyl)-;1,4-Bis(2,6-dimethylphenyl)piperazine-2,5-dione (Lidocaine Impurity) |