Used primarily as an intermediate in organic synthesis, especially in the preparation of pharmaceuticals and fine chemicals. Its ester groups allow for selective reactions, making it valuable in constructing complex molecules. Commonly employed in the synthesis of local anesthetics and antispasmodic drugs due to its ability to form substituted malonic acid derivatives. Also utilized in fragrance and flavor synthesis because of its ability to act as a building block for ester-based aroma compounds. Its reactivity in Michael additions and alkylation reactions makes it useful in research and development of new bioactive molecules.