Patent ID: 8729257

Claim:
A hybrid lipid compound based on pentaerythritol with a constructional formula wherein: R 1 is C 6 -C 18 alkyl; R 2 is C 6 -C 18 alkyl; R 5 is one among the group consisting of —CO(CH 2 ) 5 N(CH 3 ) 2 (CH 2 ) 3 Si(X) 3 Y, —CO(CH 2 ) 2 CONH(CH 2 ) 3 Si(X) 3 , —CO(CH 2 ) 3 CONH(CH 2 ) 3 Si(X) 3 and —CONH(CH 2 ) 3 Si(X) 3 , in which X is ethoxy or methoxy, Y is halogen group; and a is 2 or 3.