Oxazolone derivatives and their use as anti-helicobacter pylori agents

摘要

An anti-Helicobacter pylori agent comprising a compound represented by the formula: ;wherein A represents an aromatic ring group which may be substituted; R¹ and R², whether identical or not, each represent a hydrogen atom or a hydrocarbon group which may be substituted; R³ and R⁴, whether identical or not, each represent a hydrogen atom, a hydrocarbon group which may be substituted, an acyl group, a carbamoyl group which may be substituted, or a carboxyl group which may be esterified; or a salt thereof.