(3R)-1-(tert-butoxycarbonyl)-3-ethylpiperidine-3-acetic acid

(3R)-3-ethyl-3-(2-hydroxyethyl)-1-[(1S)-2-hydroxy-1-phenylethyl]piperidine

(R)-tert-butyl 3-ethyl-3-(2-hydroxyethyl)piperidine-1-carboxylate

(R)-methyl 2-(3-ethylpiperidin-3-yl)acetate

(R)-3-ethyl-1-(3-indoylacetyl)piperidine-3-acetic acid