N-Ethyl-4-methoxybenzimine

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

(1-Benzyl-pyrrolidin-3-ylmethoxy)-acetic acid

(1-Benzyl-piperidin-4-yloxy)-acetic acid

(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