3a-amino-6-phenyldecahydro-4-oxa-6a-azacyclopenta[d]naphthalene-7-carbonitrile

[(5S,7S)-1-[1-Cyano-meth-(E)-ylidene]-6-((R)-2-hydroxy-1-phenyl-ethyl)-6-aza-spiro[4.5]dec-7-yl]-acetic acid ethyl ester

[(5S,7S)-6-[(R)-2-(tert-Butyl-dimethyl-silanyloxy)-1-phenyl-ethyl]-7-(2-hydroxy-ethyl)-6-aza-spiro[4.5]dec-(1E)-ylidene]-acetonitrile

(S)-2-{(5R,7S)-7-[2-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-6-[(R)-2-(tert-butyl-dimethyl-silanyloxy)-1-phenyl-ethyl]-6-aza-spiro[4.5]dec-1-en-1-yl}-propionaldehyde

(S)-2-{(5R,7S)-7-[2-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-6-[(R)-2-(tert-butyl-dimethyl-silanyloxy)-1-phenyl-ethyl]-6-aza-spiro[4.5]dec-1-en-1-yl}-propan-1-ol