pilocarpic acid 4-methylbenzyl ester

(2S,3R)-2-Ethyl-3-hydroxymethyl-4-(3-methyl-3H-imidazol-4-yl)-butyric acid 1-phenyl-ethyl ester

2-methylbenzyl (2S,3R)-2-ethyl-4-hydroxy-3-((1-methyl-1H-imidazol-5-yl)methyl)butanoate

4-chlorobenzyl (2S,3R)-2-ethyl-4-hydroxy-3-((1-methyl-1H-imidazol-5-yl)methyl)butanoate

(2S,3R)-2-Ethyl-3-hydroxymethyl-4-(3-methyl-3H-imidazol-4-yl)-butyric acid 4-tert-butyl-benzyl ester