| 摘要 |
A novel metabolite, M.139603, of the empirical formula C35H53O8Na, is obtained from the aerobic fermentation of a novel micro- organism Streptomyces longisporoflavus, NCIB 11426, or an M.139603-producing mutant or variant thereof, and to the corresponding free acid form thereof, C35H54O8. The compound is useful for increasing the growth rate of ruminant animals, and/or for increasing their efficiency of food conversion, by decreasing methane formation and increasing the propionate:acetate ratio in the rumen. The compound also possesses anti-bacterial activity against Gram positive micro- organisms, and anti-coccidial activity, e.g. against Eimeria tenella. |
