N-tert-butoxycarbonyl-3,4-di-tert-butoxycarbonyloxy-6-iodo-

L-Tyrosine, 5-[[(1,1-dimethylethoxy)carbonyl]oxy]-N-[(1,1-dimethylethoxy)carbonyl]-2-iodo-, methyl ester, 1,1-dimethylethyl carbonate