| abstract |
Compounds of formula (I); wherein R1 = alkyl, alkenyl or alkynyl, O-alkyl, O-alkenyl or optionally substituted, optionally interrupted O-alkynyl; R2 = hydrogen or halogen; R3 = hydrogen, alkyl or halogen; R4= NHR' or NHOR'', R' or R'' are identical or different and represent hydrogen, alkyl, alkenyl or alkynyl, aryl; R5= hydrogen or O-alkyl; R6= alkyl or CH2-O-alkyl; R7= hydrogen or alkyl or R6 et R7 form a cycle together with the carbon carrying them in addition to the addition salts thereof with bases. The compounds of formula (I) have antibiotic properties. |