(S)-2-Amino-3-methyl-N-((S)-1-methyl-pyrrolidin-2-ylmethyl)-butyramide

(S)-2-Amino-3-methyl-N-(1-methyl-piperidin-3-yl)-butyramide

(S)-2-Amino-3-methyl-N-(1-methyl-piperidin-4-ylmethyl)-butyramide

(S)-2-Amino-3,N-dimethyl-N-(1-methyl-pyrrolidin-2-ylmethyl)-butyramide

(S)-2-Amino-3,N-dimethyl-N-((R)-1-methyl-piperidin-3-yl)-butyramide

(S)-2-Amino-N-ethyl-3-methyl-N-(1-methyl-pyrrolidin-2-ylmethyl)-butyramide

(S)-2-Amino-N-ethyl-3-methyl-N-(1-methyl-piperidin-4-ylmethyl)-butyramide

(S)-2-Amino-N-isopropyl-3-methyl-N-((R)-1-methyl-pyrrolidin-3-yl)-butyramide

(S)-2-Amino-N-isopropyl-3-methyl-N-((S)-1-methyl-pyrrolidin-3-yl)-butyramide

(S)-2-Amino-N-cyclopropyl-3-methyl-N-(1-methyl-pyrrolidin-3-yl)-butyramide

(S)-2-Amino-N-cyclopropyl-3-methyl-N-(1-methyl-pyrrolidin-3-ylmethyl)-butyramide