Cationic cholesteryl derivatives containing cyclic polar groups

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Cyclopentanohydrophenanthrene ring system doai

Reexamination Certificate

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C514S937000

Reexamination Certificate

active

06927213

ABSTRACT:
The present invention discloses compounds which are cationic cholesteryl derivatives having a nitrogen-containing ring structure as their polar head group. These compounds are useful for delivering biologically active substances to cells and for transfecting nucleic acids into cells.

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