25024-53-7 95485-28-2 EINECS 246-569-0 L-Histidine, N-((1,1-dimethylethoxy)carbonyl)-1-(2,4-dinitrophenyl)- N-((1,1-Dimethylethoxy)carbonyl)-1-(2,4-dinitrophenyl)-L-histidine N-(tert-Butoxycarbonyl)-1-(2,4-dinitrophenyl)-L-histidine