method for improving the feed efficiency and to promote the growth of animals, as well as animal feed to the warmbluetigen by management and tierfuttervormischung for the manufacture of animal feed

摘要

The novel compounds correspond to the formula: IMAGE in which X, Y, Z, R1, R2, R3 and U have the meanings given in Claim 1. They are prepared by a) reacting one mol equivalent of a compound of the formula I or II, in which the -NR1-CX-NHR1 radical is replaced, or its acid addition salts with 1 to 1.5 mol equivalents of R2NCX or b) reacting one mol equivalent of an acid addition salt of a compound of the formula I or II, in which R2 and R3 denotes hydrogen and the -NR1-CX-NHR2 radical is replaced by -NHR1, with 1 to 1.5 mol equivalents of a compound of the formula MeNCX, in which Me denotes sodium or potassium, and isolating the product. The reaction (a) is carried out in water or an inert organic solvent at 0 to 100 DEG C. The reaction (b) is carried out in aqueous medium at pH = 5 to 7 and 10 to 80 DEG C. The novel compounds of the formulae I and II are administered orally to warm-blooded animals to improve the extent of the feed effect and to increase the growth rate. A supplementary feed for increasing the growth rate of poultry, fur-bearing animals and agricultural productive animals contains 70 to 99% by weight of an edible carrier and, as the remainder, a novel compound of the formula I or II.