(2S,4R)-1-(2,2-diphenylacetyl)-4-(methyl(3-phenylprop-2-yn-1-yl)amino)piperidine-2-carbonitrile

((2S,4R)-4-(methyl(3-phenylprop-2-yn-1-yl)amino)-2-(1H-tetrazol-5-yl)piperidin-1-yl)-2,2-diphenylethanone

(2S,4R)-N-(N,N-dimethylsulfamoyl)-1-(2,2-diphenylacetyl)-4-(methyl(3-phenylprop-2-yn-1-yl)amino)piperidine-2-carboxamide

(2S,4R)-4-((4,4-dimethylpent-2-yn-1-yl)(methyl)amino)-1-(2,2-diphenylacetyl)piperidine-2-carboxylic acid

(2S,4R)-4-(2,2-diphenylacetyl)-4-(methyl(3-phenylprop-2-yn-1-yl)amino)piperidine-2-carboxylic acid