n-acetyl-l-cysteine was reacted with 2- ( 2- , 3- , or 4-methylphenyl ) -oxiranes to give mixtures of the two possible regio isomers n-acetyl-s- [ 1- ( 2- , 3- , or 4-methylphenyl ) -2-hydroxyethyl ] -l-cysteine and n-acetyl-s- [ 2- ( 2- , 3- , or 4-methylphenyl ) -2-hydroxyethyl ] -l-cysteine , respectively .
C0001047
n-acetyl-l-cysteine
C0010654
l-cysteine