(R)-3-Carboxymethoxy-pyrrolidine-1-carboxylic acid benzyl ester

(1-Acetyl-piperidin-3-yloxy)-acetic acid

((R)-1-Acetyl-piperidin-3-yloxy)-acetic acid

(1-Acetyl-piperidin-4-ylmethoxy)-acetic acid

(1-Methyl-piperidin-4-ylmethoxy)-acetic acid

(4-Chloro-cyclohexylamino)-acetic acid

(4-Bromomethyl-piperidin-1-yl)-acetic acid

(4-Bromo-cyclohexylamino)-acetic acid

(3-Iodomethyl-pyrrolidin-1-yl)-acetic acid

[3-(Toluene-4-sulfonyloxy)-piperidin-1-yl]-acetic acid

[4-(Toluene-4-sulfonyloxymethyl)-piperidin-1-yl]-acetic acid