1'-(2-hydroxy-2-phenylethyl)spiro[1H-3,1-benzoxazine-4,4'-piperidine]-2-one

1'-[2-(3,4-dimethoxyphenyl)-2-hydroxyethyl]spiro[1H-3,1-benzoxazine-4,4'-piperidine]-2-one

6-chloro-1'-[2-(4-chlorophenyl)-2-hydroxyethyl]spiro[1H-3,1-benzoxazine-4,4'-piperidine]-2-one

Spiro[benzo[d][1,3]oxazine-4,4'-piperidin]-2(1H)-one hydrochloride

4-(2-amino-5-chlorophenyl)-1-benzylpiperidin-4-ol