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Ethyl 2-amino-5-cyclohexylpentanoate

Ethyl 2-amino-5-ethylheptanoate

Ethyl 2-amino-7-methyloctanoate

Ethyl 2-amino-6-methylheptanoate

Ethyl 2-amino-4-(3-methoxyphenyl)butanoate

Ethyl 2-amino-4-(2-methoxyphenyl)butanoate

Ethyl 2-amino-4-o-tolylbutanoate

Ethyl 2-aminononanoate

Ethyl 4-(2-benzamido-4-(formyloxy)butanamido)benzoate

Ethyl 2-amino-3-cyclohexylpropanoate