Liposome comprising a compound containing 2 polyalkylene glycol groups

摘要

A liposome wherein a compound containing two polyalkylene glycol groups is bonded through a thioether group to a liposome comprising lipids whose partial component has maleimidated terminal, and wherein an amount of the bonded compound is 15 to 30 mole% based on one mole of the maleimidated lipid contained in the liposome. The liposome achieves both excellent blood retention and therapeutic effect.