Patent ID: 8653080

Claim:
A compound having the general formula I: wherein: R 1 is aryl, heteroaryl, arylalkyl, or heteroarylalkyl, each optionally substituted; R 2 is alkyl, substituted alkyl, aryl, substituted aryl, heteroaryl or substituted heteroaryl; R 3 has a formula selected from the group consisting of —R 4 —X—R 5 and —C(R) 2 —C(R) 2 —C(R) 2 —R 6 ; R 4 is a bond, alkyl, substituted alkyl, aryl or substituted aryl; R 5 is H, alkyl, substituted alkyl, aryl, substituted aryl, or an alcohol protecting group; X is selected from the group consisting of O, S, N(R), C(O), C(O)NR, S(O) n , wherein n is 0, 1 or 2; R 6 is selected from the group consisting of aryl, optionally substituted aryl, heteroaryl, and substituted heteroaryl; and each R is independently selected from the group consisting of H, aryl, substituted aryl, alkyl, or substituted alkyl; and a salt thereof.