Optionally substituted 2-nitro-3-phenylbenzofuranalkanoic and -alkenoic acids which are active as antimicrobial agents, processes for their preparation and intermediates therefor are described.
Acidic 2-nitro-3-phenylbenzofurans and their pharmaceutically acceptable salts which are active as antimicrobial agents, processes for their use and intermediates therefor are described.