3,3-diphenyl-1-[4-[phenyl-[4-(trifluoromethyl)phenyl]methyl]piperazin-1-yl]propan-1-one

3,3-diphenyl-1-[4-[phenyl-[3-(trifluoromethyl)phenyl]methyl]piperazin-1-yl]propan-1-one

1-{4-[(4-Methoxy-phenyl)-(4-trifluoromethyl-phenyl)-methyl]-piperazin-1-yl}-3,3-diphenyl-propan-1-one

1-{4-[(3,5-Ditert-butyl-4-hydroxyphenyl)-phenyl-methyl]-piperazin-1-yl}-3,3-diphenyl-propan-1-one

1-[4-[(4-chlorophenyl)-phenylmethyl]piperazin-1-yl]-3,3-diphenylpropan-1-one

4-Benzhydryl-1-(3,3-diphenyl-propionyl)-piperazine-2-carboxylic acid ethyl ester

1-[4-(Benzo[1,3]dioxol-5-yl-phenyl-methyl)-piperazin-1-yl]-3,3-diphenyl-propan-1-one

4-Benzhydryl-1-(3,3-diphenylpropionyl)-piperazine-2-carboxylic acid

1-[4-[(3,5-dichlorophenyl)-phenylmethyl]piperazin-1-yl]-3,3-diphenylpropan-1-one

1-{4-[(4-tert-Butyl-phenyl)-phenyl-methyl]-piperazin-1-yl}-3,3-diphenyl-propan-1-one

1-{4-[(3,5-Bis-trifluoromethyl-phenyl)-phenyl-methyl]-piperazin-1-yl}-3,3-diphenyl-propan-1-one hydrochloride

1-{4-[(2-Difluoromethoxy-phenyl)-phenyl-methyl]-piperazin-1-yl}-3,3-diphenyl-propan-1-one

1-[4-[(3,5-dimethoxyphenyl)-phenylmethyl]piperazin-1-yl]-3,3-diphenylpropan-1-one

1-{4-[(2,6-Dichloro-phenyl)-phenyl-methyl]-piperazin-1-yl}-3,3-diphenyl-propan-1-one hydrochloride

1-[4-[(2,3-dichlorophenyl)-phenylmethyl]piperazin-1-yl]-3,3-diphenylpropan-1-one

3,3-Diphenyl-1-[4-(9H-xanthen-9-yl)-piperazin-1-yl]-propan-1-one

1-{4-[(4-Benzyloxy-phenyl)-phenyl-methyl]-piperazin-1-yl}-3,3-diphenyl-propan-1-one

1-[4-[(2,4-dimethylphenyl)-phenylmethyl]piperazin-1-yl]-3,3-diphenylpropan-1-one

1-[4-[bis(4-methoxyphenyl)methyl]piperazin-1-yl]-3,3-diphenylpropan-1-one

1-[4-[(4-methoxyphenyl)-phenylmethyl]piperazin-1-yl]-3,3-diphenylpropan-1-one

1-{4-[(4-Hydroxy-3,5-dimethoxy-phenyl)-phenyl-methyl]-piperazin-1-yl}-3,3-diphenyl-propan-1-one

3,3-diphenyl-1-[4-[phenyl-[2-(trifluoromethyl)phenyl]methyl]piperazin-1-yl]propan-1-one

1-[4-[(4-methylphenyl)-phenylmethyl]piperazin-1-yl]-3,3-diphenylpropan-1-one

1-[4-[(4-fluorophenyl)-phenylmethyl]piperazin-1-yl]-3,3-diphenylpropan-1-one

1-{4-[(3,5-Bis-trifluoromethyl-phenyl)-phenyl-methyl]-piperazin-1-yl}-3,3-diphenyl-propan-1-one

3,3-diphenyl-1-[4-[phenyl-(3,4,5-trimethoxyphenyl)methyl]piperazin-1-yl]propan-1-one

1-{4-[Benzo[1,3]dioxol-5-yl-(4-methoxy-phenyl)-methyl]-piperazin-1-yl}-3,3-diphenyl-propan-1-one

1-[4-(10,10-Dioxo-9,10-dihydro-10lambda6-thioxanthen-9-yl)-piperazin-1-yl]-3,3-diphenyl-propan-1-one

1-Benzhydryl-4-(3,3-diphenylpropionyl)-piperazin-2-one

1-[4-(10,11-Dihydro-5Hdibenzo[a,d]cyclohepten-5-yl)-piperazin-1-yl]-3,3-diphenylpropan-1-one hydrochloride

4-[(2R,5R)-1-benzhydryl-5-methylpiperazin-2-yl]butan-1-ol

4-[(2R,5R)-1-benzhydryl-5-methylpiperazin-2-yl]butoxy-tert-butyl-dimethylsilane

(2R,5R)-1-benzhydryl-5-methyl-2-pentylpiperazine

3-[(2R,5R)-1-benzhydryl-5-methyl-4-(4-methylphenyl)sulfonylpiperazin-2-yl]propoxy-tert-butyl-dimethylsilane

(2R,5R)-1-benzhydryl-2-benzyl-5-methylpiperazine

4-[(2R,5R)-1-benzhydryl-5-methyl-4-(4-methylphenyl)sulfonylpiperazin-2-yl]butoxy-tert-butyl-dimethylsilane

4-[(2R,5R)-1-benzyl-5-methylpiperazin-2-yl]butoxy-tert-butyl-dimethylsilane

(2R,5R)-2-benzyl-1-[(4-fluorophenyl)methyl]-5-methylpiperazine

4-[(2R,5R)-1-benzyl-5-methylpiperazin-2-yl]butan-1-ol

(2R,5R)-1-benzyl-5-methyl-2-pentylpiperazine

(2R,5R)-1,2-dibenzyl-5-methylpiperazine

3-[(2R,5R)-1-benzhydryl-5-methylpiperazin-2-yl]propoxy-tert-butyl-dimethylsilane

(2R,5R)-2-benzyl-1-[(4-fluorophenyl)methyl]-5-methyl-4-[4-(trifluoromethyl)phenyl]sulfonylpiperazine

1-[(2R,5R)-5-benzyl-4-[(4-fluorophenyl)methyl]-2-methylpiperazin-1-yl]-2,2-diphenylethanone

4-[(2R,5R)-1-benzhydryl-5-methyl-4-[4-(trifluoromethyl)phenyl]sulfonylpiperazin-2-yl]butoxy-tert-butyl-dimethylsilane

(2R,5R)-1-benzyl-5-methyl-2-nonylpiperazine

(2R,5R)-1,2-dibenzyl-5-methyl-4-[4-(trifluoromethyl)phenyl]sulfonylpiperazine

1-[4-[(2,4-dichlorophenyl)-phenylmethyl]piperazin-1-yl]-3,3-diphenylpropan-1-one

1-[4-[(3,4-dichlorophenyl)-phenylmethyl]piperazin-1-yl]-3,3-diphenylpropan-1-one

1-{4-[(2,4-Dichloro-phenyl)-phenyl-methyl]-piperazin-1-yl}-3,3-diphenyl-propan-1-one hydrochloride