The present disclosure relates to a novel lipid compound and a lipid nanoparticle composition including the same and, more specifically, the lipid nanoparticle composition includes ionized lipid, helper lipid, PEG-lipid, and additives, and may mitigate changes and side effects in the delivery mechanism and enhance the protein expression efficiency by including a biofriendly vitamin-based novel lipid compound and helper lipids including neutral lipids.

A compound that is suitably used for formation of an optically anisotropic film having excellent reverse wavelength dispersibility and moisture-heat resistance; a polymerizable composition; an optically anisotropic film; an optical film; a polarizing plate; and an image display device. The present invention relates to a compound represented by Formula (I-1) P.sup.1-SP.sup.1-Ar.sup.1-Mes-Ar.sup.2-SP.sup.2-P.sup.2 (I-1).

A compound that is suitably used for formation of an optically anisotropic film having excellent reverse wavelength dispersibility and moisture-heat resistance; a polymerizable composition; an optically anisotropic film; an optical film; a polarizing plate; and an image display device. The present invention relates to a compound represented by Formula (I-1) P.sup.1-SP.sup.1-Ar.sup.1-Mes-Ar.sup.2-SP.sup.2-P.sup.2 (I-1).