for the following products
1-(9H-Fluoren-9-yl)-3-oxo-2,7,10,13,16-pentaoxa-4-azanonadecan-19-oic acid | 15-(9-Fluorenyloxycarbonyl)amino-4,7,10,13-tetraoxa-pentadecanoic acid | Fmoc-N-amido-PEG4-propionic acid | Fmoc-NH-PEG(4)-COOH and Fmoc-15-Amino-4,7,10,13-tetraoxapentadecanoic acid
