N-Acetyl-L-proline68-95-130 % similar Glycylserine687-38-730 % similar L-Alanyl-L-proline13485-59-130 % similar Glycyl-DL-norleucine1504-41-230 % similar 3-Chlorocyclobutane-1-carboxylic acid35207-71-730 % similar L-Alpha,beta-Diaminopropionic acid4033-39-030 % similar 2,3-Diaminopropionic acid515-94-630 % similar 3-Aminocyclobutane-1-carboxylic acid74316-27-130 % similar