Rezk R. Ayyad, Ahmed M. Nejm, and Ahmed R Ayyad. “he ctivity of ome ntibiotics epend on tereochemistry of hem (Its tructure)”. ournal of rogress in ngineering and hysical cience, vol. 2, no. 2, Apr. 2023, pp. 5-7, https://www.pioneerpublisher.com/jpeps/article/view/230.