Fmoc-Ser-OMe (Fmoc-L-Ser-OMe) is a hydroxylated L-amino acid protected with a 9-fluorenylmethyloxycarbonyl (Fmoc) group. Fmoc-Ser-OMe involves in chlorophyll–amino acid conjugates synthesis, and acts as a chromo/fluorophores modified protein and emits visible to near-infrared lights efficiently. Fmoc-Ser-OMe glycosylates and produces small mucin-related Olinked glycopeptides, as an alcohol acceptor.