3-(Methylamino)-2-nitrobenzoic Acid is an intermediate in the synthesis of Endophenazine B (E555485), a new phenazine antibiotic isolated from the arthropod associated endosymbiont Streptomyces anulatus and shows antimicrobial activities against Gram-positive bacteria and some filamentous fungi, and herbicidal activity against Lemna minor (duckweed).