DL-Glutamic acid

4-Aminophenylacetic acid

D-Phenylalanine methyl ester hydrochloride

N-Acetyl-DL-tryptophan

Ethyl 3-aminopropanoate hydrochloride

DL-Norvaline

L-Norleucine

N-(2-Acetamido)iminodiacetic acid

D-Prolinamide

L-Arginine ethyl ester dihydrochloride

Timonacic

Arginine glutamate