Widely used in pharmaceutical synthesis, this compound serves as a key building block for creating active pharmaceutical ingredients (APIs), particularly in the development of kinase inhibitors and other bioactive molecules. Its piperazine core with a protected amine group allows for selective modifications, making it valuable in drug discovery. The acetic acid side chain enables conjugation to other molecular fragments, facilitating the assembly of complex drug candidates. It is especially useful in solid-phase and solution-phase peptide-like synthesis where controlled reactivity and solubility are required. The dihydrate form improves stability and handling during multi-step reactions.