Glycosylation linker, compound containing glycosylation linker moiety and physiologically active substance moiety or salt thereof, and production method thereof
[Problem] The purpose is to provide a compound containing a carrier linker moiety and a physiologically active substance moiety or a salt of the compound, wherein a carrier in the carrier linker moiety is biodegradable and is soluble in water. [Solution] The purpose can be achieved by employing a sugar chain as a carrier and focusing on the structure of a carrier-linker having a specified structure. A compound containing a carrier linker moiety and a physiologically active substance moiety or a salt of the compound is discovered.