Patent ID: 7507858

Claim:
A compound represented by the following structural formula: wherein m is 0 or 1; p 1 and p 2 are 1; R 1 and R 2 are, independently of each other, unsubstituted or substituted and selected from hydrogen C 1 -C 10 alkyl, C 2 -C 10 alkenyl, cycloalkyl, aryl, heterocyclyl, heteroaryl, C 1 -C 10 alkyl, C 2 -C 10 alkenyl, C 1 -C 10 alkylcycloalkyl, C 1 -C 10 alkylaryl, C 1 -C 10 alkylheterocyclyl and C 1 -C 10 alkylheteroaryl; or or a stereoisomer, enantiomer, racemate, or pharmaceutically acceptable salt thereof.