the following have been synthesized : n-acetyl-s- ( 2-hydroxybutyl ) -l-cysteine [ ( 2-hydroxybutyl ) mercapturic acid ] and n-acetyl-s- ( 3-hydroxybutyl ) -l-cysteine [ ( 3-hydroxybutyl ) mercapturic acid ] isolated as dicyclohexylammonium salts , n-toluene-p-sulphonyl-s- ( 2-hydroxybutyl ) -l-cysteine , s-butylglutathione and n-acetyl-s-butylcysteinyl-glycine ethyl ester .
C0001047
mercapturic acid
C0010654
l-cysteine