methyl (4R,7S)-7-tert-butoxycarbonylamino-12,14-bis[(tert-butyl)dimethylsilyloxy]-1,3,4,5,6,7,8,10-octahydro-11-methyl-6,10-dioxo-9,2,5-benzoxathiaazacyclododecine-4-carboxylate

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

(8R,11S)-11-Amino-2,4-bis-(tert-butyl-dimethyl-silanyloxy)-1-methyl-10,14-dioxo-5,7,8,9,10,11,12,14-octahydro-13-oxa-6-thia-9-aza-benzocyclododecene-8-carboxylic acid methyl ester

(8R,11S)-11-[((2S,3R)-1-tert-Butoxycarbonyl-3-hydroxy-pyrrolidine-2-carbonyl)-amino]-2,4-bis-(tert-butyl-dimethyl-silanyloxy)-1-methyl-10,14-dioxo-5,7,8,9,10,11,12,14-octahydro-13-oxa-6-thia-9-aza-benzocyclododecene-8-carboxylic acid methyl ester

tert-butyl N-[(4R,7S)-7-({(3R)-1-[N-(tert-butoxycarbonyl)-L-seryl]-3-hydroxy-L-prolyl}amino)-1,3,4,5,6,7,8,10-octahydro-12,14-dihydroxy-11-methyl-6,10-dioxo-9,2,5-benzoxathiazacyclododecin-4-ylcarbonyl]-L-alaninate