This issue is devoted to the 23rd Conference on Isoprenoids, which takes place in Minsk on September 4-7, 2016. The subject of the Сonference is a widespread large group of natural compounds whose molecules consist of C5 isoprene units connected to each other in various ways. A number of vitamins, pheromones, allelopathins, receptor sensors as well as sterols, the key elements of cell structure, and many other physiologically active natural compounds, such as e.g. steroidal hormones of humans and animals, belong to isoprenoids. They are responsible for the reproduction, sexual differentiation, development, adaptation, regulation of mineral and protein metabolism, nervous activity, digestive system, i.e. virtually all the vitally important functions of a living organism. An attractive feature of the Conference is a variety of isoprenoid- related topics: from their search in natural sources, chemical synthesis and structural analysis to molecular biological, genetic engineering, ecological, and medicinal aspects. All topics are considered by the specialists from different fields during common discussions offering a broad vision of a subject that is especially important for young scientists for imaging the current state and perspectives of natural products chemistry – a basement of efficient medications, ecologically friendly agrochemicals and biotechnologies for modern time and for future. The current issue contains more than 80 abstracts of papers presented at the Conference (the author's style and spelling retained).