1,1-Dimethylethyl 1-methyl-1-((1-methylethyl)phenyl)ethyl peroxide 68540-62-5 EINECS 271-308-2 Peroxide, 1,1-dimethylethyl 1-methyl-1-((1-methylethyl)phenyl)ethyl tert-Butyl 1-methyl-1-(isopropylphenyl)ethyl peroxide