2,4-DB isobutyl ester 4-(2,4-Dichlorophenoxy)butyric acid isobutyl ester 51550-64-2 BUTYRIC ACID, 4-(2,4-DICHLOROPHENOXY)-, ISOBUTYL ESTER Butanoic acid, 4-(2,4-dichlorophenoxy)-, 2-methylpropyl ester EINECS 257-277-8 Isobutyl 4-(2,4-dichlorophenoxy)butyrate