S-Adenosyl-L-methionine disulfate tosylate, A cofactor for catechol O-methyltransferase (COMT) and DNA methyltransferases (DNMT), Alternate Name/Synonyms: AdoMet SAM disulfate p-toluenesulfonate; SAMe, Purity: G95% by HPLC, CAS Number: 97540-22-2, 500mg