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2-Amino-n-methyl-n-[2-oxo-2-(1h-pyrrol-2-yl)-ethyl]-acetamide

2-Amino-n-isopropyl-n-[2-oxo-2-(1h-pyrrol-2-yl)-ethyl]-acetamide

2-Amino-n-cyclopropyl-n-[2-oxo-2-(1h-pyrrol-2-yl)-ethyl]-acetamide

(S)-2-amino-n-[2-oxo-2-(1h-pyrrol-2-yl)-ethyl]-propionamide

(S)-2-amino-n-methyl-n-[2-oxo-2-(1h-pyrrol-2-yl)-ethyl]-propionamide

(S)-2-amino-n-isopropyl-n-[2-oxo-2-(1h-pyrrol-2-yl)-ethyl]-propionamide

(S)-2-amino-n-cyclopropyl-n-[2-oxo-2-(1h-pyrrol-2-yl)-ethyl]-propionamide

(S)-2-amino-3-methyl-n-[2-oxo-2-(1h -pyrrol-2-yl)-ethyl]-butyramide

(S)-2-amino-3,n-dimethyl-n-[2-oxo-2-(1h-pyrrol-2-yl)-ethyl]-butyramide

(S)-2-amino-n-isopropyl-3-methyl-n-[2-oxo-2-(1h-pyrrol-2-yl)-ethyl]-butyramide