IMPROVEMENTS IN OR RELATING TO PHENETHANOLAMINES

摘要

beta -Phenethanolamines of the following formula are effective in promoting growth and improving feed efficiency and leanness in animals: wherein: R<1> is hoydrogen, hydroxy, or methoxy; R<2> is hydrogen or fluoro; R<3> is hydrogen or C1-C2 alkyl; R<4> is hydrogen or methyl; R<5> is hydrogen, fluoro, nitro, hydroxy, SO2CH3 or CONH2; provided that R<1> is hydrogen only when R<5> is nitro or SO2CH3; or an acid addition salt thereof.