Cationic surfactants

Dioleoyl-3-trimethylammonium propane

1,2-Dioleoyl-3-trimethylammonium propane (often abbreviated DOTAP or 18:1TAP) is a di-chain, or gemini, cationic surfactant. It is most commonly encountered as an active ingredient in certain fabric softeners. The pure material can also be used for the liposomal-transfection of DNA, RNA and other negatively charged molecules. (Wikipedia).

Dioleoyl-3-trimethylammonium propane
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Dimethyldioctadecylammonium chloride