The book titled "Structure of Organic Compounds" presents general notions related to the analysis, structure, and reactivity of organic compounds: classification, chemical bonds, mutual influences of atoms in the molecule, acids and bases in organic chemistry, as well as structural analysis of organic compounds. A special place is given to stereoisomerism and the stereochemical aspects of the structure and reactivity of organic compounds, considering their importance in relation to the chirality of organic compounds, as presented in the context of understanding biochemical processes and bioactive substance-receptor interactions. Although organic compounds and many of their reactions have been used for thousands of years, organic chemistry as a science was only established in the mid-19th century, when significant discoveries in the field of natural compounds were made. The book includes seven chapters, with the most important topics being: methods of purification and analysis of organic compounds, spectral methods of analysis, the general characteristics of organic compounds, and the mutual influence of atoms in molecules.