155453-26-2 40298-71-3 71603-44-6 EINECS 254-876-6 L-Tyrosine, O-((2,6-dichlorophenyl)methyl)-N-((1,1-dimethylethoxy)carbonyl)- N-((tert-Butoxy)carbonyl)-O-((2,6-dichlorophenyl)methyl)-L-tyrosine NSC 334369 O-((2,6-Dichlorophenyl)methyl)-N-((1,1-dimethylethoxy)carbonyl)-L-tyrosine