| 摘要 |
The disclosure relates to comprising benzo 1,3! dioxin derivatives of the formula: wherein X and Y are each a 2,2,2- trichloroethylidene radical or a dichlorovinylidene radical; and R1 - R4 are variously selected from hydrogen, chlorine, amino, nitro, acetamido, ammonium sulphonato, carbamoyl, sulphamoyl, sulpho or 2,2,2-trichloro-1-hydroxyethylcarbamoyl. The compositions are of use in animal husbandry to improve growth of ruminant animals. |
