Patent ID: 7402589

Claim:
A compound, or an enantiomeric or a diastereomeric form, or salts thereof, said compound having the formula: wherein R has the formula: -(L) x -R 3 R 3 is chosen from: i) substituted or unsubstituted C 6 -C 10 aryl; ii) substituted or unsubstituted C 1 -C 10 heteroaryl; iii) substituted or unsubstituted C 3 -C 10 carbocyclic; or iv) substituted or unsubstituted C 1 -C 10 heterocyclic; the index x is 0 or 1; R 1 has the formula: -(L 1 ) y -R 5 R 5 is a unit chosen from: i) substituted or unsubstituted C 3 -C 10 carbocyclic; ii) substituted or unsubstituted C 6 -C 10 aryl; iii) substituted or unsubstituted C 1 -C 10 heterocyclic; and iv) substituted or unsubstituted C 1 -C 10 heteroaryl; the index y is 0 or 1; R 2 has the formula: -(L 2 ) z -R 6 R 6 is a unit chosen from: i) hydrogen; ii) substituted or unsubstituted C 1 -C 10 linear or branched hydrocarbyl; iii) substituted or unsubstituted C 3 -C 10 carbocyclic; iv) substituted or unsubstituted C 6 -C 10 aryl; v) substituted or unsubstituted C 1 -C 10 heterocyclic; and vi) substituted or unsubstituted C 1 -C 10 heteroaryl; the index z is 0 or 1; L, L 1 and L 2 are linking groups each of which are independently chosen from: i) —C(R 7 ) 2 —; ii) —NR 7 —; and iii) —O—; R 7 is hydrogen, C 1 -C 4 alkyl, and mixtures thereof; or two R 7 units can be taken together to form a carbonyl unit.