<unk>  is a PEG/lipid conjugate (i.e. PEGylated lipid), specifically, it is the N,N-dimyristylamide of 2-hydroxyacetic acid, O-pegylated to a PEG chain mass of about 2 kilodaltons (corresponding to about 45-46 ethylene oxide units per molecule of N,N-dimyristyl hydroxyacetamide). It is a non-ionic surfactant by its nature. It has been deployed in the Pfizer-BioNTech SARS-CoV-2 mRNA vaccine (0.05 mg per dose) that contains the active ingredient tozinameran.
ALC-0159
OSU-6162
HU-308
ALC-0315
HPTN 052
MRK-016
NHS 24
VIR-576