Potential Antioxidant Activity of New Tetracyclic and Pentacyclic Nonlinear Phenothiazine Derivatives.Published in:Biochemistry Research International, 2016, p. 1, doi. 10.1155/2016/9896575By:Engwa, Godwill Azeh;Ayuk, Eugene Lekem;Igbojekwe, Benardeth Ujunwa;Unaegbu, MarcellusPublication type:Article