Patent ID: 8476247

Claim:
A compound of Formula II or a pharmaceutically acceptable salt thereof, wherein R 1 is selected from —(CO)C 1 -C 6 alkyl, —(CO)CH(halo) 2 , —(CO)phenyl, a —(CO)C 1 -C 10 optionally branched aliphatic, —(CO)C 3 -C 8 cycloalkyl which is optionally substituted with one or more of hydroxy or —(CH 2 ) n OH where n is 1-6, —(CO)aryl which is optionally substituted with one or more of hydroxy or —(CH 2 ) n OH where n is 1-6; and a —(CO)C 3 -C 7 heterocyclyl which is optionally substituted with one or more of hydroxy or —(CH 2 ) n OH, wherein n is 1-6; R 2 is selected from —H and halo; and R 3 is selected from hydroxy, —O(CO)CH(halo) 2 , —O(CO)(CH 2 ) 2 CH 3 , —O(CO)CH(CH 3 ) 2 , and —O(CO)CH 2 C(CH 3 ) 3 .