Acidic polycyclic ether antibiotics and microorganisms useful in the production thereof
AssigneePfizer Inc.
InventorEdward J. Tynan, III
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Abstract
This invention relates to novel acidic polycyclic ether antibiotics CP-91,243 and CP-91,244 of the formula ##STR1## wherein R is H in CP-91,243 and R is CH.sub.3 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.
Claims3
An antibiotic of the formula ##STR6## and the pharmaceutically-acceptable cationic salts thereof wherein R is H or CH.sub.3.
Dependencies are inferred from the claim text.