(4R,5S,6S,7R)-4,7-Dibenzyl-1,3-bis-(3-methyl-but-2-enyl)-5,6-bis-(2-trimethylsilanyl-ethoxymethoxy)-[1,3]diazepan-2-ylidene-cyanamide

(4R,5S,6S,7R)-4,7-Dibenzyl-1,3-bis-cyclopropylmethyl-5,6-bis-(2-trimethylsilanyl-ethoxymethoxy)-[1,3]diazepan-2-ylidene-cyanamide

(4R,5S,6S,7R)-4,7-Dibenzyl-1,3-bis-cyclobutylmethyl-5,6-bis-(2-trimethylsilanyl-ethoxymethoxy)-[1,3]diazepan-2-ylidene-cyanamide

(4R,5S,6S,7R)-1,3,4,7-Tetrabenzyl-5,6-bis-(2-trimethylsilanyl-ethoxymethoxy)-[1,3]diazepan-2-ylidene-cyanamide

(4R,5S,6S,7R)-4,7-Dibenzyl-1,3-bis-cyclopentylmethyl-5,6-bis-(2-trimethylsilanyl-ethoxymethoxy)-[1,3]diazepan-2-ylidene-cyanamide