Patent ID: 8404862

Claim:
A compound having the formula: wherein: y ranges from 4-11; DMTr is a dimethoxytrityl group; R is H or —CH 3 ; and R′ is —CH 3 or a lipophilic moiety selected from the group consisting of a lipid, cholesterol, oleyl, retinyl, cholesterol residues, cholic acid, adamantane acetic acid, 1-pyrene butyric acid, dihydrotestosterone, 1,3-Bis-O(hexadecyl)glycerol, geranyloxyhexyl group, hexadecylglycerol, borneol, menthol, 1,3-propanediol, heptadecyl group, palmitic acid, myristic acid, O3-(oleoyl)lithocholic acid, O3-(oleoyl)cholenic acid, dimethoxytrityl, phenoxazine, or R and R′, together with the nitrogen to which they are bound, form a group.