Patent ID: 6989402

Claim:
A compound having the formula wherein n is an integer from 0 to 4; R 1 is C 1 to C 6 alkyl or C 3 cycloalkyl; R 2 and R 3 are the same or different and are hydrogen, halogen, alkyl of 1 to 4 carbons, at least one of R 2 and R 3 being other than hydrogen; R 4 is a carboxylic acid amide (CONR′R″) in which R′ and R″ are the same or different and are independently selected from hydrogen, alkyl, aryl, and heteroaryl substituted or unsubstituted R 5 is hydrogen or an acyl (such as acetyl or benzoyl) or other group capable of bioconversion to generate the free phenol structure (where in R 5 =H); including all stereoisomers thereof, prodrug esters thereof, and pharmaceutically acceptable salts thereof.