Antibiotic compounds

摘要

The present invention provides a compound of the formula (I) <IMAGE> (I) wherein: R1 is 1-hydroxyethyl, 1-fluoroethyl or hydroxymethyl; R2 is hydrogen or C1-4 alkyl; R3 and R4 are ortho with respect to one another wherein R3 and R4 are independently hydroxy or in vivo hydrolyzable esters thereof; the benzene ring being optionally further substituted; or a pharmaceutically acceptable salt or in vivo hydrolyzable ester thereof.