Are there alternatives to (3R)-3-Pyrrolidinecarboxylic acid hydrochloride (CAS: 1202245-51-9) in synthesis?

There are alternatives to (3R)-3-Pyrrolidinecarboxylic acid hydrochloride (CAS: 1202245-51-9) in synthesis, such as other pyrrolidine derivatives like (3S)-3-pyrrolidinecarboxylic acid hydrochloride. Isomers and analogs can also serve as effective alternatives. Commonly, researchers explore the use of other carboxylic acids or their derivatives to achieve similar functional groups. It's important to consider the specific requirements of the synthesis process when choosing an alternative.