Amphoteric sterols and their use

摘要

Amphoteric sterol derivatives, and liposomes containing these derivatives are new. The amphoteric sterol derivatives have an isoelectric point of 4.5-8.5 and are compounds of formula (I): Amphoter-Y-spacer-X-sterol (I) X and Y : linking groups. Independent claims are also included for: (A) liposomes containing compounds (I); and (B) the production of liposomes loaded with active substances.