Alkyl-1-cyclopropyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic acids of the formula ##STR1## in which X.sup.1, X.sup.2 and X.sup.3 each independently is hydrogen, a nitro group, a halogen atom or an alkyl radical with 1 to 3 carbon atoms, with the proviso that at least one of them is an alkyl radical, or pharmaceutically acceptable salts or hydrates thereof, are antibacterially active and promote animal growth.
公式为##STR1##的烷基-1-环丙基-1,4-二氢-4-氧基-
3-喹啉羧酸,其中X.sup.1、X.sup.2和X.sup.3分别独立地为氢、硝基、卤原子或具有1至3个碳原子的烷基基团,但至少其中之一为烷基基团,或其药用可接受盐或
水合物,具有抗菌活性并促进动物生长。