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Methyl L-threoninate hydrochloride L-Glutamic acid dimethyl ester hydrochloride Methyl L-prolinate hydrochloride Ethyl 2,6-diaminohexanoate dihydrochloride Methyl L-tyrosinate L-Proline benzyl ester hydrochloride Methyl L-phenylalaninate hydrochloride Dimethyl L-cystinate dihydrochloride Diethyl L-glutamate hydrochloride D(-)-Norvaline