| abstract |
The invention relates to novel antibiotics of formula (I) wherein R1 represents alkyl, alkoxy, haloalkoxy, halogen or cyano; one or two of U, V, W and X represent(s) N, the remaining represent CH, or, in case of U, V and/or W, may also represent CRa and, in the case of X, may also represent CRb; Ra represents halogen; Rb represents halogen or alkoxy; M is a linking chain containing a non-aromatic cyclic or heterocyclic group, and D represents alkyl, aryl or heteroaryl. |