The core of the molecule is a pyrrolidine ring, a fully saturated five-membered heterocycle containing one nitrogen atom.

- The ring nitrogen is bonded to a two-carbon methylene linker (-CH2-CH2-), which connects further to the nitrogen of a morpholine ring (a six-membered saturated heterocycle containing one oxygen and one nitrogen in para positions).

- The pyrrolidine carbon meta to the ring nitrogen is substituted with a carboxymethyl group (-CH2-COOH), i.e., the carbon is bonded to a methylene that in turn carries a carboxylic acid group.