| abstract |
1. An N-acylanthranilic acid derivative represented by the following general formula or a salt thereof: [Formula 1] in which R represents an optionally protected carboxyl group or an optionally protected 1H-tetrazol-5-yl group; R represents a hydrogen atom, a halogen atom, a cyano group , nitro group, optionally protected hydroxyl group, optionally protected amino group, optionally protected or substituted alkylamino group, optionally substituted dialkylamino group, optionally substituted alkyl The first group or an optionally substituted alkoxy group; R is an optionally substituted aryl group or optionally substituted heterocyclic group; X b is a carbonyl group; X b is a bond; X b is a bond; X b is oxygen atom, an optionally protected imino group optionally substituted alkylene group or a bond; IA is a group represented by the following general formula: [Formula 2] in which R represents a hydrogen atom or a phenolic hydroxyl protecting group; one of R, R, R and R represents a group represented by the general formula —YR, in which R represents a halogen atom, cyano group, nitro group, optionally protected hydroxyl group, optionally protected amino group, optionally protected or substituted alkylamino group, optionally substituted dialkylamino group, optionally substituted alkyl a group, an optionally substituted alkoxy group, an optionally substituted aryl group, an optionally substituted aryloxy group, optionally |