Patent ID: 8841276

Claim:
A compound of the following formula: or salts thereof wherein X is O, S, CH 2 , or NR′, x and y are integers between 0 and 3; and G is C 1-6 alkyl, cycloalkyl, alkenyl, heterocyclyl, aryl, heteroaryl, halo, —OR′, —NR′R″, —CF 3 , —CN, —NO 2 , —C 2 R′, —SR′, —N 3 , —C(═O)NR′R″, —NR′C(═O)R″, —C(═O)R′, —C(═O)OR′, —OC(═O)R′, —OC(═O)NR′R″, —NR′C(═O)OR″, —SO 2 R′, —SO 2 NR′R″, and —NR′SO 2 R″, where R′ and R″ are individually hydrogen, C 1-6 alkyl, cycloalkyl, heterocyclyl, aryl, arylalkyl or benzyl.