PROBLEM TO BE SOLVED: To provide a production method to improve the solubility of arginine residue imidazopyrroloquinoline into water and high purity.SOLUTION: The present invention provides a compound represented by general formula (1).SELECTED DRAWING: None【課題】アルギニン残基イミダソピロロキノリンの水への溶解性の向上と高純度を目的とする製造方法の提供。【解決手段】一般式(1)で表される、化合物。【選択図】なし