| abstract |
The subject of the invention is the compounds of formula (I), in which R1 = H, OH, alkyl, optionally substituted alkenyl or alkynyl or alkoxy; R2 = H, Hal; R3 = H, alkyl, Hal; R4 = (a), Rg and Rh: H, alkyl, aryl heterocyclic ring; R5 = H or O-alkyl; R6 = alkyl or CH2-O-alkyl; R7 = H or alkyl. The compounds of formula (I) have properties antibiotics. |