Patent ID: 7763648

Claim:
A compound of formula (I) wherein R 1 is selected from the group consisting of C 1-6 alkyl, C 2-4 alkenyl, C 2-4 alkynyl, aryl, heteroaryl, aralkyl and C 1-4 alkyl-heteroaryl; wherein the aryl or heteroaryl, whether alone or as part of a substituent group is optionally substituted with one or more substituents independently selected from hydroxy, carboxy, halogen, C 1-4 alkyl, halogenated C 1-4 alkyl, C 1-4 alkoxy, halogenated C 1-4 alkoxy, cyano, nitro, amino, (C 1-4 alkylamino) and di(C 1-4 alkyl)amino; R 2 is selected from the group consisting of OR A , NR A R B , SR A and —SO 2 —R A ; wherein R A and R B are each independently selected from the group consisting of hydrogen and C 1-4 alkyl; R 3 is selected from the group consisting of C 1-6 alkyl, C 2-4 alkenyl, C 2-4 alkynyl, aryl, heteroaryl and —CC—R 4 ; R 4 is selected from the group consisting of C 1-6 alkyl, C 1-4 alkyl-OH, C 1-4 alkyl-NR C R D , halogenated C 1-4 alkyl, C 1-4 alkyl-O—C 1-4 alkyl, C 3-8 cycloalkyl, aryl and heteroaryl selected from the group consisting of pyrrolyl, furyl, thienyl, oxazolyl, imidazolyl, purazolyl, isoxazolyl, isothiazolyl, triazolyl, thiadiazolyl, pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, pyranyl, furazanyl, indolizinyl, indolyl, isoindolinyl, indazolyl, benzofuryl, benzothienyl, benzimidazolyl, benzthiazolyl, purinyl, quinolizinyl, quinolinyl, isoquinolinyl, isothiazolyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, naphthyridinyl and pteridinyl; wherein the aryl or heteroaryl is optionally substituted with one or more substituents independently selected from hydroxy, carboxy, halogen, C 1-4 alkyl, halogenated C 1-4 alkyl, C 1-4 alkoxy, halogenated C 1-4 alkoxy, cyano, nitro, amino, (C 1-4 alkylamino) and di(C 1-4 alkyl)amino; and wherein R C and R D are each independently selected from the group consisting of hydrogen and C 1-4 alkyl; or a pharmaceutically acceptable salt thereof.