Patent ID: 8247400

Claim:
A compound of formula (I): wherein R 1 is hydrogen, alkyl, alkenyl, alkynyl, aryl, heteroaryl, heterocycle, —C(O)alkyl, —C(O)OH, —CH(NH 2 )(CH 2 ) 3 —NH—C(NH)NH 2 or —CH(NH 2 )—CH 2 —C(O)NH 2 ; wherein, when present, any alkyl, aryl, heteroaryl or heterocycle group may optionally be substituted by halogen, hydroxyl, cyano, nitro, amino, alkylamino, dialkylamino, arylamino, diarylamino, amido, carboxyl, alkyl, halogenated alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl, heterocycle, heterocyclealkyl, aroyl, acyl, alkoxy, aryloxy, heteroaryloxy, cycloalkyloxy, cycloalkylalkyloxy, arylalkyloxy, heteroarylalkyloxy, thio, alkylhio, arylthio, alkylsulfinyl, alkylsulfonyl, arylsulfinyl, arylsulfonyl, heteroarylsulfinyl, heteroarylsulfonyl, alkoxycarbonyl, aryloxycarbonyl or heteroaryloxycarbonyl; or a pharmaceutically acceptable salt thereof.