Sergey Victorovich Shcherbatykh., Yevgeniya Nikolaevna Gerasimova, Natalya Viktorovna Morgacheva,, 1Bunin Yelets State University, Yelets, Russia. Address: 28 Kommunarov Str., Yelets, Lipetsk Region, 399770 2Department of chemistry and biology, Bunin Yelets State University, Yelets, Russia. Address: 28 Kommunarov Str., Yelets, Lipetsk Region, 399770 3 Bunin Yelets State University, Yelets, Russia. Address: 28 Kommunarov Str., Yelets, Lipetsk Region, 399770