(2S,3aR,5S,6S,7aS)-5,6-Dihydroxy-octahydro-indole-1,2-dicarboxylic acid 1-benzyl ester 2-methyl ester

3-[2-(tert-Butyl-diphenyl-silanyloxy)-ethyl]-2,5-dihydro-pyrrole-1-carboxylic acid tert-butyl ester

(R)-2-[(R)-3-(tert-Butyl-diphenyl-silanyloxy)-2-methoxy-propionylamino]-4-methyl-pentanoic acid

(2S,3aR,5S,6S,7aS)-5,6-Bis-methoxymethoxy-octahydro-indole-1,2-dicarboxylic acid 1-benzyl ester 2-methyl ester

(2S,3aR,5S,6S,7aS)-1-{(R)-2-[(R)-3-(tert-Butyl-diphenyl-silanyloxy)-2-methoxy-propionylamino]-4-methyl-pentanoyl}-5,6-bis-methoxymethoxy-octahydro-indole-2-carboxylic acid methyl ester