(2,4-Dichlorophenoxy)acetic acid, methyl ester 1928-38-7 2,4-D Methyl ester 2,4-Dichlorophenoxyacetic acid methyl ester 2,4-Dichlorophenoxyacetic acid, methyl ester Acetic acid, (2,4-dichlorophenoxy)-, methyl ester Methyl (2,4-dichlorophenoxy)acetate Methyl 2,4-D ester NSC9399