| 摘要 |
(1) Animal feedstuffs contain 10-500 ppm, pref. 50-200 ppm, pseudothymin (2,4-dioxo-6-methyl-1,2,3,4-tetrahydro-pyrimidine) (I) in addition to other conventional ingredients. (2) additives for animal feedstuffs contain 0.1-10%, pref. 0.5-2% (I). (I) are growth promoting agents probably acting by inhibiting monoaminooxidase. LD50 (p.o. rats) is >12 g/kg. Growth trials on rats were made using (I) and a control and compared against results obtained using aureomycin. The comparison was favourable. |
