This compound is a doubly protected derivative of (2S,4S)-4-aminoproline, with tert-butoxycarbonyl (Boc) groups on the pyrrolidine ring nitrogen and the 4-amino substituent. The free carboxylic acid at position 2 enables its use as a building block in peptide synthesis, allowing selective amide bond formation while the Boc groups prevent unwanted side reactions. It is particularly useful in solid-phase peptide synthesis for incorporating modified proline residues into complex peptides and proteins. Applications include the development of pharmaceuticals, peptidomimetics, and bioactive compounds in organic and medicinal chemistry.