Compounds of formula (I):
wherein:
R1 is hydrogen, halogen or Cl-4 alkoxy;
X is oxygen; NR in which R4 is hydrogen, Cl-4 alkyl, or-Y-R2; -C=O; or -CHOH;
Y is-CH2-CHOH, and when X is -C =O it may also be-CH =CH-; and
R2 is Ci-4 alkyl, one carbon atom of which is di-or tri-halogenated;
or salts thereof, are useful in promoting growth of ruminants. Processes for their production, veterinary formulations and treatments are described.
式(I)化合物:其中:R1 是氢、卤素或 Cl-4 烷氧基;X 是氧;NR 其中 R4 是氢、Cl-4 烷基或-Y-R2;-C=O;或-CHOH;Y 是-
CH2-CHOH,当 X 是-C =O 时,也可以是-CH =CH-;R2 是 Ci-4 烷基,其中一个碳原子被二卤化或三卤化;或它们的盐,可用于促进反刍动物的生长。 描述了它们的生产工艺、兽药配方和治疗方法。