| 摘要 |
Provided is a cationic lipid expressed in the following formula (I), which facilitates introduction of a nucleic acid into a cell, a composition containing the cationic lipid and the nucleic acid, a method for introducing the nucleic acid into the cell by using the composition containing the cationic lipid and the nucleic acid, and the like (In the formula, R1 and R2 are the same alkenyl or different alkenyls, X1 and X2 are hydrogen atoms or together form a single bond or alkylene, X3 is not present or is alkyl and the like, Y is not present or is an anion, a and b are the same or different between 0 and 3, L3 is a single bond and the like, R3 is alkyl and the like, and L1 and L2 are -O-, -CO-O-, or -O-CO-). |
