An α-L-rhamnose ligand equipped with an amine-functionalized linker through a short ethyl spacer. The primary amine can be covalently coupled with N-hydroxysuccinimide (NHS) activated esters to form stable amide bonds, providing a straightforward route to conjugate the ligand onto NHS-activated molecules and surfaces. This compound provides an α-L-rhamnose building block for glycoconjugate synthesis and the construction of probes that exploit naturally occurring anti-rhamnose antibodies, with applications in antibody-recruiting molecule and immunotherapy research.