The present invention provides a cationic lipid which is able to be used for nucleic acid delivery to the cytoplasm. A cationic lipid according to the present invention is, for example, a compound represented by formula (1) or a pharmaceutically acceptable salt thereof, wherein L1 and L2 independently represent an alkylene group having 3 to 10 carbon atoms; R1 and R2 independently represent an alkyl group having 4 to 24 carbon atoms or an alkenyl group having 4 to 24 carbon atoms; R3 represents an alkyl group having 1 to 3 carbon atoms; and X1 represents a single bond or CO—O—.
本发明提供了一种可用于将核酸递送至细胞质的阳离子脂质。 根据本发明的阳离子脂质是例如由式(1)代表的化合物或其药学上可接受的盐,其中 L1 和
L2 独立地代表具有 3 至 10 个碳原子的亚烷基;R1 和 R2 独立地代表具有 4 至 24 个碳原子的烷基或具有 4 至 24 个碳原子的烯基;R3 代表具有 1 至 3 个碳原子的烷基;X1 代表单键或 CO-O-。