Patent ID: 7053096

Claim:
A compound having the following structure: or a structure according to formula I: wherein R 1 has the formula II: R 2 and R 3 are independently C (1-12) alkyl, optionally, R 2 having one or two nonadjacent carbon atoms of the C 1-12) alkyl being replaced by an oxygen atom; and wherein: C* is a chiral carbon atom; n is four; R 4 is —O—X—(R 5 ) m ; m being two or three, depending on valence, and X being selected from the group consisting of C, P or S; wherein one R 5 is ═O and any other R 5 is a member independently selected from Group Q, and Group Q is selected from the group consisting of: hydroxyl group; substituted or unsubstituted C (3-10) alkyl, C (2-10) alkenyl, C (2-10) alkynyl, C (1-10) alkoxyl, C (1-10) oxoalkyl, C (1-10) carboxyalkyl, C (1-10) hydroxyalkyl, or substituted C (1-2) alkyl group; —OR 6 , R 6 being a substituted or unsubstituted C (1-10) alkyl, C (2-10) alkenyl, C (2-10) alkynyl, or C (1-10) oxoalkyl; substituted or unsubstituted heterocylic group, attached to X through an atom within the ring, having one or two rings, each ring containing from four to seven atoms, wherein the heteroatom(s) of said heterocyclic group is 1 or 2 nitrogens; and substituted or unsubstituted carbocyclic group that is attached to X through a carbon atom within a ring, having one or two rings, each ring containing four to seven atoms, wherein the substituents of said substituted carbocyclic group are selected from the group consisting of amino, C (2-6) alkenyl, C (1-6) alkyl, C (1-6) alkoxyl, C (1-6) hydroxyalkyl, hydroxyl, C (1-6) oxoalkyl, azido, cyano, C (2-6) mono- or di-haloalkyl, isocyano, isothiocyano, imino, a chlorine atom, a bromine atom, a fluorine atom and an oxygen atom.