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2,2,5,7,8-Pentamethyl-6-chromanol serves as a reagent for the quantitative analysis of α-tocopherol by GC/MS/MS. It can function as a model compound for α-tocopherol and undergo oxidation to yield 5-alkoxymethyl-2,2,7,8-tetramethyl-6-chromanol. Additionally, it acts as an internal standard in HPLC for determining α- and γ-tocopherol levels in rabbit serum and liver.