Feroze Hussain presented on macrolactonization. The presentation covered lactones, which are naturally occurring and synthetic cyclic organic esters. It discussed the Yamaguchi macrolactonization method introduced in 1979 for synthesizing lactones and the mechanism. Applications of lactones include anti-cancer drugs, antibiotics, flavors, and plastics. In conclusion, lactones are important in medicine and industry, playing crucial roles while also producing good product yields.