10443-70-6 Butanoic acid, 4-(4-chloro-2-methylphenoxy)-, ethyl ester Butyric acid, 4-((4-chloro-o-tolyl)oxy)-, ethyl ester ETHYL 4-(4-CHLORO-2-METHYLPHENOXY)BUTANOATE Ethyl 4-(2-methyl-4-chlorophenoxy)butylate MCPB ethyl MCPB ethyl ester MCPBE