p-nitrobenzyl 3,5-bis(tert-butyldimethylsilyloxy)-2,6-dimethylbenzoate

4-nitrobenzyl 2-(bromomethyl)-3,5-bis[(tert-butyl)dimethylsilyloxy]-6-methylbenzoate

2-[(R)-2-((S)-2-tert-Butoxycarbonylamino-3-hydroxy-propionylamino)-2-methoxycarbonyl-ethylsulfanylmethyl]-3,5-bis-(tert-butyl-dimethyl-silanyloxy)-6-methyl-benzoic acid 4-nitro-benzyl ester