oxidative stress-induced damage to the biomolecules and thus, delay the onset of cancers and many age-related diseases. Therefore, the development of novel and potent antioxidants is justified. METHODS During this study, we synthesized symmetricalBis-Schiffbases of carbohydrazide 1-27, and evaluated their in vitro antioxidative activity and cytotoxic activity. RESULTS Among synthesized compounds, six compounds