Objects of the present invention are to study the synthesis of a novel pyridinecarboxylic acid (2-aminophenyl)amide derivative having a novel urea structure and to find a pharmacological effect of the derivative. The invention provides a compound represented by the formula (1) or a salt thereof. In the formula, R1 and R2 represent a hydrogen atom, a lower alkyl group or the like; R3 represents a hydroxy group, a lower alkoxy group, a lower cycloalkyloxy group, an aryloxy group, a carboxy group, a lower alkoxycarbonyl group, —OCONRaRb, —NRcRd or the like; R4 and R5 represent a halogen atom, a lower alkyl group, a hydroxy group, a lower alkoxy group or the like; Ra and Rb represent a hydrogen atom, a lower alkyl group, a lower cycloalkyl group, an aryl group, a heterocyclic group or the like; Rc and Rd represent a hydrogen atom, a lower alkyl group, a lower cycloalkyl group, an aryl group or the like; X represents a lower alkylene group; Y represents a single bond, a lower alkylene group; W1-W2 represents N—C or C—N; and l and m represent 0, 1, 2 or 3.