2,2,5,7,8-Pentamethyl-1-hydroxychroman 2,2,5,7,8-Pentamethyl-6-chromanol 2,2,5,7,8-Pentamethyl-6-hydroxychroman 2H-1-Benzopyran-6-ol, 3,4-dihydro-2,2,5,7,8-pentamethyl- 6-Hydroxy-2,2,5,7,8-pentamethylchroman 950-99-2 Chroman C1 Chromane C1 Chromanol NSC 226236 PMHCR