| 摘要 |
The fat content of sows' milk is increased thereby increasing the energy supplied to the sow's piglets, by administering a phenethanolamine of formula (I): <CHEM> wherein: R is hydrogen, hydroxy, methoxy or amino; R<1> is hydrogen or cyano; R<2> is C2-C4 alkyl or a group of formula (II) <CHEM> R<3> is hydrogen or methyl; R<4> is hydrogen, hydroxy, fluoro, nitro or carbamoyl; provided that: R and R<4> are not both hydrogen; R<4> is not hydroxy when R is hydrogen; R is hydrogen or amino when R<1> is cyano; R is hydrogen, hydroxy or methoxy when R<1> is hydrogen; R<2> is C2-C4 alkyl when and only when R<1> is cyano; or a physiologically acceptable acid addition salt thereof. |
