Pyridine derivative, anti-ulcer drug, and antibacterial drug

Abstract

A pyridine derivative or a salt thereof expressed by the following formula 1: ##STR1## wherein W represents a group expressed by the following formula 2 or formula 3; ##STR2## wherein R.sub.1 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 R.sub.2 and R.sub.3 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.

Dependencies are inferred from the claim text.