Potential Antioxidant Activity of New Tetracyclic and Pentacyclic Nonlinear Phenothiazine Derivatives

Figure 4

Catalase free radical scavenging potential in various animal groups. Group 1: 6-chloro-11-azabenzo[a]phenothiazine-5-one; group 2: 6-[4-bromophenyl]-10-methyl-11-azabenzo[a]phenothiazine-5-one; group 3: ascorbic acid; group 4: solvent.