主题词：Synthesis and biological activity; Synthesis and Characterization of Heterocyclic Compounds; Analytical Chemistry and Chromatography; Synthesis and Reactions of Organic Compounds; Synthesis and Biological Evaluation; Analytical Methods in Pharmaceuticals; Synthesis and Reactivity of Sulfur-Containing Compounds; Chemical synthesis and pharmacological studies; Structural and Chemical Analysis of Organic and Inorganic Compounds; Pharmacological Effects of Natural Compounds; Phenothiazines and Benzothiazines Synthesis and Activities; Free Radicals and Antioxidants; Computational Drug Discovery Methods; Natural product bioactivities and synthesis; Chemical Synthesis and Analysis; Synthesis of heterocyclic compounds; Synthesis of Organic Compounds; Chemical Reactions and Isotopes; Chemical Thermodynamics and Molecular Structure; Phytochemicals and Antioxidant Activities; Eicosanoids and Hypertension Pharmacology; Chemical Reaction Mechanisms; Organic Chemistry Cycloaddition Reactions; Phytochemistry and Biological Activities; Biochemical effects in animals