Novartis AG
Lipids and lipid compositions for the delivery of active agents

Abstract:

This invention provides for a compound of formula (I): ##STR00001## or a pharmaceutically acceptable salt thereof, wherein R.sup.1-R.sup.4, L and X are defined herein. The compounds of formula (I) and pharmaceutically acceptable salts thereof are cationic lipids useful in the delivery of biologically active agents to cells and tissues.