Patent ID: 7381714

Claim:
A compound having the structure of Formula I: wherein: R 1 is hydroxymethyl; R 2 is benzyl, five or six membered monocyclic cycloalkyl or five or six membered monocyclic heterocyclyl; and R 3 is selected from wherein R 4 and R 5 are independently selected from hydrogen; C 1-6 alkyl, C 2-6 alkenyl, or C 2-6 alkynyl optionally substituted with hydroxy, alkoxy, or five or six membered monocyclic aryl; five or six membered monocyclic aryl optionally substituted with halo, hydroxy, alkoxy, or CF 3 ; —CO 2 H; —SO 3 H; —C(O)OR 6 ; CH(OH)R 6 ; or C(O)NR 6 R 7 ; wherein R 6 and R 7 are hydrogen, alkyl optionally substituted with hydroxy, alkoxy, or aryl; five or six membered monocyclic cycloalkyl, or five or six membered monocyclic.