49.9 (SAM), 402.1-249.9 (S-adenosylmethionine-d3), 122.0-76.0 (cysteine), 124.0-78.0 (cysteine-d2), 150.0-104.0 (methionine), 153.0-107.0 (methionine-d

49.9 (SAM), 402.1-249.9 (S-adenosylmethionine-d3), 122.0-76.0 (cysteine), 124.0-78.0 (cysteine-d2), 150.0-104.0 (methionine), 153.0-107.0 (methionine-d3), 136.0-90.0 (Hcy), 140.0-94.0 (homocysteine-d8), 104.0-58.0 (DMG), and 110.0-64.0 (N,Ndimethyl-d6-glycine HCl). All parameters had been optimized by direct infusion…