| abstract |
The present invention relates to C-20 olefin derivatives of 16-membered ring macrolide antibiotics repromicin, rosaramicin, 5-mycaminosyltylonolide, desmycosin, lactenocin, O-demethyllactenocin, 4'-deoxymycaminosyltylonolide and 23-deoxymycaminosyltylonolide, which are useful against bacterial and mycoplasmic pathogens in animals. Also claimed are a pharmaceutical composition of such derivatives and their use in treating bacterial and mycoplasmic infections in animals. |