( + ) -n-acetyl-s-n-propyl-l-cysteine s-oxide , was prepared as the dicyclohexylammonium salt , ( - ) -n-propyl-mercapturic acid sulphoxide was prepared as the free acid , and s-isopropyl-l-cysteine and isopropylmercapturic acid were also prepared .
C0001047
mercapturic acid
C0010654
l-cysteine