(R)-3-(boc-amino)-3-propanoic acid (R)-tert-butyl 2-hydroxyethyl-carbamate (R)-tert-butyl ethylcarbamate (S)-2-((tert-butoxycarbonyl)amino)-acetic acid (S)-2-(boc-amino) (S)-3-(boc-amino)-3-propanoic acid (S)-3-(boc-amino)-4-butanoic acid (S)-methyl 2-((tert-butoxycarbonyl)amino)-propanoate (S)-tert-butyl (3-hydroxypropan-2-yl)carbamate (S)-tert-butyl 2-hydroxyethyl-carbamate (S)-tert-butyl ethylcarbamate (tert-butoxycarbonyl)amino)-acetic acid (tert-butoxycarbonyl)amino)ethyl (tert-butoxycarbonyl)amino-acetic acid 2-((tert-Butoxycarbonyl)amino)-propanoic acid 2-(boc-amino)-propanoic acid 2-(tert-butoxycarbonyl)aminobutanoic acid 3-(boc-amino)-3-propanoic acid 3-(boc-amino)-butanoic acid bis(tert-butoxycarbonyl)amino boc-amino boc-amino-carboxylic acid boc-aminoethyl Boc-aminomethyl ethyl carbamate ethyl(methyl)carbamate methoxycarbonylamino methyl ((tert-butoxycarbonyl)amino)-carboxylate tert-butyl butylcarbamate tert-butyl hydroxymethylcarbamate tert-butyl methyl(methyl)carbamate tert-butyl methylcarbamate tert-butyl N-methylcarbamate tert-butyl oxyethylcarbamate