p. 1529 - 1532
(2007/10/03)p. 1987 - 1990
(2007/10/03)[tert-Butoxycarbonylmethyl-(2-hydroxy-ethyl)-amino]-acetic acid tert-butyl ester
N-Carbobenzyloxy-N',N'-bis-(t-Butoxycarbonylmethyl)-ethylenediamine
toluene-4-sulfonic acid
{tert-butoxycarbonylmethyl-[2-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)-ethyl]-amino}-acetic acid tert-butyl ester