2,2,7,8-tetramethyl-5-nitrochroman-6-ol 2H-1-benzopyran-6-ol, 3,4-dihydro-2,2,7,8-tetramethyl-5-nitro- InChI=1/C13H17NO4/c1-7-8(2)12-9(5-6-13(3,4)18-12)10(11(7)15)14(16)17/h15H,5-6H2,1-4H