(1R,4R)-(S)-N-[4-(Acetyl-methyl-amino)-cyclohexyl]-2-amino-propionamide

N-[1-((S)-2-Amino-3-methyl-butyryl)-pyrrolidin-2-ylmethyl]-N-methyl-acetamide

N-[1-((S)-2-Amino-3-methyl-butyryl)-piperidin-4-yl]-N-methyl-acetamide

N-[1-((S)-2-Amino-3-methyl-butyryl)-pyrrolidin-3-yl]-N-ethyl-acetamide

N-[1-((S)-2-Amino-3-methyl-butyryl)-piperidin-2-ylmethyl]-N-ethyl-acetamide

N-[1-((S)-2-Amino-3-methyl-butyryl)-piperidin-4-ylmethyl]-N-ethyl-acetamide

N-[1-((S)-2-Amino-3-methyl-butyryl)-pyrrolidin-3-yl]-N-isopropyl-acetamide

N-[1-((S)-2-Amino-3-methyl-butyryl)-piperidin-3-ylmethyl]-N-isopropyl-acetamide

N-[1-((S)-2-Amino-3-methyl-butyryl)-pyrrolidin-2-ylmethyl]-N-cyclopropyl-acetamide

N-[(R)-1-((S)-2-Amino-3-methyl-butyryl)-piperidin-3-yl]-N-cyclopropyl-acetamide

((S)-3-Acetylamino-pyrrolidin-1-yl)-acetic acid