(S)-N-(1-Amino-1-oxobutan-2-yl)-4-chlorobutanamide; N-[(1S)-1-(Aminocarbonyl)propyl]-4-chlorobutanamide; (S)-N-[1-(Aminocarbonyl)propyl]-4-chlorobutanamide; (S)-N-(1-Amino-1-oxobutan-2-yl)-4-chlorobutanamide; (S)-N-(1-Amino-1-oxobutan-2-yl)-4-chlorobutanamide