Under the auspices of the Dean Dr. Khalid Mohammed Alkharfy, the college held a lecture entitled: " Carbonic anhydrase inhibitors as antitumor agents " , which was presented by Dr. / Ahmed Mahmoud Alafeefy, associate professor and supervisor of the Department of Pharmaceutical Chemistry, on Tuesday, 23/04/1434 corresponding to 05/03/2013, where the lecture was highlighted the new Tyrphostines were low nanomolar or subnanomolar CA IX/XII inhibitors whereas they were less effective as inhibitors of CA I and II. The structure-activity relationship for this class of effective CA inhibitors is also discussed, and that was in the context of the activities of the development and the quality unit headed by Vice Dean Dr. Abdullah Ali Alkahtani in the second semester of the academic year 1433/1434 H.