Tetrahydroquinoline is one of the most important simple nitrogen heterocycles, widely found in nature and in a variety of pharmacologically active compounds. Tetrahydroquinoline is an important structure for the synthesis of various biologically active derivatives.
Thienopyridines are similar in structure to quinoline and isoquinoline, and are a class of heterocyclic compounds with important physiological activity and medicinal value. Thienopyridines are a subclass of antiplatelet drugs that prevent platelet aggregation by binding to selected extracellular cysteine residues on the P2Y12 receptor located on the platelet membrane.