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(S)-2-amino-n-[2-(cyclopropyl-methyl-amino)-cyclohexyl]-propionamide

(S)-2-amino-n-[2-(isopropyl-methyl-amino)-cyclohexyl]-3-methyl-butyramide

(S)-2-amino-n-[2-(cyclopropyl-methyl-amino)-cyclohexyl]-3-methyl-butyramide

[4-(Cyclopropyl-methyl-amino)-cyclohexylamino]-acetic acid

4-(2-Hydroxy-ethyl)-2-methyl-piperazine-1-carboxylic acid benzyl ester

4-(2-Hydroxy-ethyl)-2-methyl-piperazine-1-carboxylic acid tert-butyl ester

4-(2-Hydroxy-ethyl)-3-methyl-piperazine-1-carboxylic acid tert-butyl ester

4-(2-Hydroxy-ethyl)-piperazine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester

4-(2-Hydroxy-ethyl)-piperazine-1-carboxylic acid benzyl ester

4-(2-Hydroxy-ethyl)-3-methyl-piperazine-1-carboxylic acid benzyl ester