Pyridine derivative, anti-ulcer drug, and antibacterial drug

摘要

A pyridine derivative or a salt thereof expressed by the following formula 1: <CHEM> wherein W represents a group expressed by the following formula 2 or formula 3; <CHEM> <CHEM> wherein R1 represents an alkenyloxy group; n represents 1 or 2; Ra represents a lower alkyl group; and Rb represents a halogen atom; and wherein each of R2 and R3 represents a hydrogen atom, a lower alkyl group, a lower alkoxy group, or halogenated alkyl group; Y represents a group expressed by - S-, -NH- or - CONH-; m represents an integer of 0 to 2; and p represents 0 or 1. The pyridine derivative has an anti- ulcer effect or an antibacterial activity against Helicobacter pyroli to be available for prevention or cure of ulcers.