for the following products
Fmoc-(N-gamma-4-methyltrityl)-L-alpha,gamma-diaminobutyric acid | Fmoc-L-Dab(Mtt)-OH | N-alpha-(9-Fluorenylmethyloxycarbonyl)-N-gamma-(p-methyltrityl)-L-2,4-diaminobutyric acid and (2S)-2-[[(9H-Fluoren-9-ylmethoxy)carbonyl]amino]-4-[[(4-methylphenyl)diphenylmethyl]amino]butanoic acid