Lipid C24 is an ionizable lipid that can be formulated into lipid nanoparticles for delivery of RNA. Lipid C24 LNPs containing mRNA encoding SARS-CoV-2 Spike protein generated 10X higher binding and pseudoneutralizing antibodies than DLin-MC3-DMA LNPs and showed less injection site inflammation.
Reference: US 2022/0218622 A1 “Ionizable lipids and methods of manufacture and use thereof”