The object of this invention is to provide a water-soluble compound comprising a carrier-linker moiety and a physiologically active substance moiety, or salts thereof, wherein the carrier is biodegradable.This invention found that the compound or salts thereof comprising a moiety of carrier-linker and a moiety of physiologically active substance can solve the previous problesms by using a sugar chain as the carrier and focusing on the structure of the carrier-linker with specified structure.本發明之目的係提供一種水溶性之含有載劑連接基部分及生理活性物質部分的化合物或其鹽,且該載劑為生物體分解性者。本發明發現含有載劑連接基部分及生理活性物質部分之化合物或其鹽,藉由採用糖鏈做為載劑,並著眼於具有特定構造之載劑-連接基的構造而解決上述問題。由於本案的圖為試驗結果數據,並非本案的代表圖。故本案無指定代表圖。
