A method for promoting production of useful livestock comprising administering to such livestock an amount effective therefor of a monosilylated aminopheylethylamine derivative of the formula ##STR1## in which X and Y are identical or different and represent hydrogen or CN, R.sup.2 represents hydrogen or methyl, R.sup.3 represents t-butyl, isopropyl, monofluoro-t-butyl or 1-cyclohexyl-ethyl, and R.sup.4, R.sup.5 and R.sup.6 denote a straight-chain or branched alkyl rdical, or a physiologically tolerated salt thereof. Those compounds wherein R.sup.3 is monofluoro-t-butyl or 1-cyclohexyl-ethyl are new, as is its intermediate ##STR2##
一种促进有用家畜生产的方法,包括向这种家畜施加有效量的单
硅基化
氨基乙基胺衍
生物,其
化学式为##STR1## 其中X和Y相同或不同,表示氢或CN,R.sup.2表示氢或甲基,R.sup.3表示叔丁基、异丙基、单
氟叔丁基或1-环己基乙基,而R.sup.4、R.sup.5和R.sup.6表示直链或支链烷基,或其生理上可耐受的盐。其中R.sup.3为单
氟叔丁基或1-环己基乙基的化合物是新的,其中间体为##STR2##。