Patent ID: 7319102

Claim:
A compound including all enantiomeric and diasteriomeric forms and pharmaceutically acceptable salts thereof, said compound having the formula: wherein: R has the formula: R 1 is hydrogen or substituted or unsubstituted C 6 -C 10 aryl; R 2 is substituted or unsubstituted C 6 -C 10 aryl; L and L 1 are linking units each of which is independently chosen from: i) —NH—; ii) —O—; iii) —SO 2 —; iv) —C(O)—; v) —C═NOR 6 ; vi) —C(R 6 ) 2 —; vii) —C[═C(R 6 ) 2 ]—; and viii) —C(OR 5 ) 2 —; R 5 is hydrogen, —COR 6 , or two R 5 units can be taken together with the oxygen atoms to form a cyclic ketal ring comprising 5 or 6 atoms; and R 6 is methyl, ethyl, or n-propyl.