The book "Chemistry of biologically active substances: electronic course of lectures for students of specialty 1-48 02 01 "Biotechnology" by Viktor Nikolaevich Leontiev is a unique and valuable resource for students and specialists in the field of biotechnology . This is not just a textbook, but a real find for those who seek a deeper understanding of the chemistry of biologically active substances and their role in modern biotechnological processes. In his work, Leontiev invites readers to plunge into the world of chemistry, where biologically active substances become key players in various fields of science and medicine. The course of lectures covers a wide range of topics, ranging from the basics of chemistry to the complex biochemical processes that underlie the functioning of living organisms. Readers will be able to learn about the structure and properties of various classes of biologically active compounds, such as alkaloids, glycosides, flavonoids and many others. The book will be especially interesting for students studying in the specialty "Biotechnology", as well as for those who work in related fields, such as pharmaceuticals, ecology and agronomy .. It is suitable for both beginners and more experienced professionals who want to update their knowledge and get acquainted with modern approaches to the study of chemistry of biologically active substances. The topics raised in the book cover not only theoretical aspects, but also the practical application of knowledge in real conditions. Leontiev focuses on the importance of biologically active substances in medicine, their role in the development of new drugs and biologically active additives. Readers will be able to understand how chemical compounds affect human health, what mechanisms work at the cellular level, and how this knowledge can be used to improve quality of life. The author's style is characterized by accessibility and clarity of presentation, which makes the material easy to perceive. Viktor Nikolayevich Leontiev is an experienced teacher and researcher who was able to combine theory and practice, which makes his lectures especially valuable. His other works are also devoted to biochemistry and biotechnology, which confirms his in-depth knowledge and experience in this field. The book “Chemistry of biologically active substances” will be useful not only for students, but also for teachers, researchers and practitioners seeking to expand their horizons and deepen their understanding of chemistry in the context of biotechnology. It will become an indispensable assistant in the educational process and in scientific activities, opening new horizons for the study and use of biologically active substances. If you are looking for a high-quality and informative course of lectures on chemistry of biologically active substances, which will help you not only to master the theory, but also to apply knowledge in practice, then the work of Viktor Nikolaevich Leontiev will be an excellent choice. Don’t miss the opportunity to enrich your knowledge and develop skills that will be useful in your future career in biotechnology and related fields.