23-DEMYCINOSYLTYLOSIN-AND 20-DIHYDRO-23-DEMYCINOSYLTYLOSIN ANTIBIOTICS,PROCESS AND MICROORGANISMS FOR THEIR PREPARATION AND VETERINARY COMPOSITIONS CONTAINING THEM

摘要

Macrolides having the structural formula (I): …CHEM… were Q is -CH2OH or -CHO;… and esters and salts thereof, having useful activity against gram-positive bacteria and Mycoplasma species, and their preparation by cultivating Streptomyces fradiae NRRL 12170.