A 2-phenoxyaniline derivative represented by the formula:
wherein R1 is a hydrogen atom or a lower alkoxy group, R2 is a halogen atom or a nitro group, and R3 is a hydrogen atom or a halogen atom, or a pharmaceutically acceptable salt thereof.
A 2-phenoxyaniline derivative represented by the formula: ##STR1## wherein R.sup.1 is a hydrogen atom or a lower alkoxy group, R.sup.2 is a halogen atom or a nitro group, and R.sup.3 is a hydrogen atom or a halogen atom, or a pharmaceutically acceptable salt thereof.