1995 Volume 48 Issue 7 Pages 667-670
20-Homo tylosin, 20-nor tylosin, 20-deoxy-19, 20-didehydro tylosin (6-vinyl tylosin) and 2", 3"-didehydro-3"-deoxy tylosin were prepared by multi-step procedures. 20-Homo tylosin was about twice less active than tylosin while the other coumpounds exhibited very weak antibacterial activity.