Used as a key intermediate in the synthesis of complex organic frameworks, particularly in the development of covalent organic frameworks (COFs) and metal-organic frameworks (MOFs). Its multiple functional groups—carboxylic acids and protected amine—allow for sequential and selective reactions, enabling precise construction of porous, structured materials. These materials are applied in gas storage, catalysis, and sensing due to their high surface area and tunable pore environments. The hydroxy groups further provide sites for post-synthetic modification or metal coordination, enhancing functionality in catalytic or adsorptive applications.