| 摘要 |
<p>The invention concerns compounds of formula (I), in which Y is oxygen, N-Nalc1 or NOalc2; X represents hydrogen, hydroxyl, alkyl, alkenyl, alkynyl, alkoxy, CONOR or NRcRd, Rc and Rd being hydrogen or alkyl; Z represents hydrogen, halogen or free, etherified or esterified OH; R2 hydrogen or halogen; R3 hydrogen, alkyl or halogen; R hydrogen or alkyl; R1 hydrogen, alkyl, alkenyl or alkynyl; R5 hydrogen or O-alkyl; R6 alkyl or CH2-O-alkyl and R7 hydrogen or alkyl; or R6 and R7 form with the carbon atom which bears them a cyclic radical containing up to 8 carbon atoms. The compounds of formula (I) have antibiotic properties.</p> |
