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6-Sulfatoxy melatonin sodium salt

5-Sulfooxymethylfurfural sodium salt

5-Sulfooxymethylfurfural-13c6 sodium salt

3-Sulfino-dl-valine

Sulfanilic acid-d4

Sulphanilamide-d4 hydrochloride

3-Sulfoglycolithocholic acid disodium salt

S-(-)-sulpiride-d3

Sodium 1-[(9e)-9-octadecenoyloxy]-2,5-dioxo-3-pyrrolidinesulfonate

2,5-Dioxo-1-pyrrolidinyl n-{[(2,5-dioxo-1-pyrrolidinyl)oxy]carbonyl}-beta-alaninate-1,4-dioxane (1:1)