3-[4-(tert-butoxycarbonylamino-imino-methyl)phenoxy]-2-hydroxypropionic acid

3-[4-(tert-butoxycarbonylamino-imino-methyl)phenoxy]-2-hydroxypropionic acid benzhydryl ester

3-[4-(tert-butoxycarbonylamino-imino-methyl)phenoxy]-2-(1,3-dioxo-1,3-dihydroisoindol-2-yloxy)propionic acid benzhydryl ester

diphenylmethyl 2-(aminooxy)-3-{4-[N-(tert-butoxycarbonyl)carbamimidoyl]phenoxy}propanoate

methyl 3-{4-[N-(tert-butoxycarbonyl)carbamimidoyl]phenoxy}-2-[(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)oxy]propanoate