26133-20-0 Ethyl 2-methyl-2-(4-((trifluoromethyl)sulfonyl)phenoxy)propanoate Ethyl p-trifluoromethylsulfonylphenoxyisobutyrate Propanoic acid, 2-methyl-2-(4-((trifluoromethyl)sulfonyl)phenoxy)-, ethyl ester