It is difficult to be discharged from the cancer/gun cell, at the same time to local remedy the ideal anti- cancer/gun medicine offers. The rotakisan chemical compound which includes the chemical compound which is displayed with the below-mentioned chemical formula 1 as the basic framework (however, m 2 and n 3, as for X the anion molecule or the anion atom). < Conversion 1 >ガン細胞から排出されにくく、かつ局所的治療に好適な抗ガン剤を提供する。下記化学式1で表される化合物を基本骨格として包含するロタキサン化合物(ただし、m≧2かつn≧3、Xは陰イオン分子又は陰イオン原子)。【化1】