1-benzyl-3-[[tert-butyl(dimethyl)silyl]oxymethyl]piperidin-4-one
1-benzyl-3-hydroxymethyl-4-oxopiperidine
(8-benzyl-1,4-dioxa-8-aza-spiro[4.5]dec-6-yl)-acetonitrile
2-(8-benzyl-1,4-dioxa-8-aza-spiro[4.5]dec-6-yl)-1-(4-fluoro-phenyl)-ethanone
(8-benzyl-1,4-dioxa-8-aza-spiro[4.5]dec-6-yl)-methanol