| 摘要 |
PCT No. PCT/US89/02400 Sec. 371 Date Nov. 5, 1991 Sec. 102(e) Date Nov. 5, 1991 PCT Filed Jun. 1, 1989 PCT Pub. No. WO90/15062 PCT Pub. Date Dec. 13, 1990.This invention relates to novel acidic polycyclic ether antibiotics CP-91,243 and CP-91,244 of the formula <IMAGE> +TR <IMAGE> wherein R is H in CP-91,243 and R is CH3 in CP-91,244. The invention also relates to novel Actinomadura roseorufa microorganisms; processes for producing the novel antibiotics and the known antibiotic UK-58,852; methods for controlling coccidial infections in poultry, enteritis in livestock and swine dysentery; methods for promoting growth and/or improving efficiency of feed utilization in ruminant or monogastric animals; and nutrient feed compositions. This is a National filing under 35 U.S.C. 371 based on PCT/US89/02400 filed Jun. 1, 1989.
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