O-(Acetoacetyl)-N-(9-fluorenylmethoxycarbonyl)-L-serin-tert-butylester

N-(9-Fluorenylmethoxycarbonyl)-O-<(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-(1--->3)-O-(2-azido-4,6-di-O-benzoyl-2-desoxy-β-D-galactopyranosyl)>-L-serin-tert-butylester

N-(9-Fluorenylmethoxycarbonyl)-O-<(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-(1--->3)-O-(2-azido-4,6-di-O-benzoyl-2-desoxy-α-D-galactopyranosyl)>-L-serin-tert-butylester