Patent ID: 8748661

Claim:
A compound of formula I wherein R 1 is unsubstituted or substituted C 1 -C 10 alkyl, unsubstituted or substituted C 2 -C 10 alkenyl, unsubstituted or substituted C 2 -C 10 alkynyl, unsubstituted or substituted C 3 -C 8 cycloalkyl, unsubstituted or substituted C 1 -C 10 alkoxy, unsubstituted or substituted C 3 -C 8 cycloalkoxy, unsubstituted or substituted C 6 -C 14 aryl, an unsubstituted or substituted 5- to 10-membered heteroaryl wherein 1 to 4 ring atoms are independently selected from nitrogen, oxygen and sulfur, an unsubstituted or substituted 5- to 10-membered heteroalicyclic ring wherein 1 to 3 ring atoms are independently nitrogen, oxygen or sulfur, —OR, —C(O)R, —C(O)OR, —C(O)NRR′, —NRR′, —S(O) 2 R, —S(O) 2 OR, and —S(O) 2 NRR′, R and R′ are independently selected from the group consisting of hydrogen and unsubstituted or substituted C 1 -C 10 alkyl, unsubstituted or substituted C 2 -C 10 alkenyl, unsubstituted or substituted C 2 -C 10 alkynyl; or a tautomer, geometrical isomer, enantiomer, diastereomer, racemate form, pharmaceutically acceptable salt or prodrug thereof.