2-(2'',4''-Difluordiphenyl-4'-yloxy)-2-methylpropionsaeureaethylester [German] 79781-90-1 Ethyl 2-((2',4'-difluoro(1,1'-biphenyl)-4-yl)oxy)-2-methylpropanoate Propanoic acid, 2-((2',4'-difluoro(1,1'-biphenyl)-4-yl)oxy)-2-methyl-, ethyl ester