Patent ID: 7572791

Claim:
A compound having the following formula: R is H, OH, F, Cl, Br, I, C 1 -C 6 alkyl, aryl or (CH 2 ) n -aryl; one of R 1 and R 2 is H or C 1 -C 6 alkyl, and the other is O-aryl, wherein aryl is optionally substituted with F, Cl, Br, I, CN, CO 2 H, CO 2 R 3 , NO 2 , CF 3 , substituted or unsubstituted C 1 -C 6 alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, OCF 3 , OR 3 , OSO 2 -aryl, substituted or unsubstituted amine, NHCOR 3 , NHSO 2 R 3 , CONHR 3 , or SO 2 NHR 3 ; and R 3 is H, or substituted or unsubstituted C 1 -C 6 alkyl, substituted or unsubstituted aryl.