disclosed is a pharmaceutical composition containing an aminobenzoic acid derivative as an active ingredient represented by the following general formula : ## str1 ## wherein 1 r denotes one member selected from the group consisting of the residual groups formed by removing oh at 1 or 1 position from arabinose , xylose , glucose , galactose , rhamnose and mannose , and 2 r denotes hydrogen or methyl group , or a pharmaceutically acceptable salt thereof .