Patent ID: 6992092

Claim:
A compound of formula (I) a stereoisomer thereof, or a pharmaceutically acceptable salt of said compound or stereoisomer, wherein: R 1 is wherein R represents, independently, from 1–3 of hydrogen; —NH 2 ; —CN; —NO 2 ; halogen; —(C 1 –C 6 )alkyl; or —(C 1 –C 6 )alkoxy; R 2 is —(C 1 –C 6 )alkoxy; R a and R b are —CH 3 or —OH, provided R a and R b are not both —OH; X is —CH 2 OH; —COOR c , wherein R c is hydrogen or —(C 1 –C 6 )alkyl; or —CON(heterocycloalkyl), said heterocycloalkyl moiety being selected from the group consisting of azabicycloheptanyl, azetidinyl, benzazepinyl, 1,3-dihydroisoindolyl, carbazolyl, indolinyl, imidazolidinyl, morpholinyl, phenothiazinyl, phenoxazinyl, piperazinyl, piperidyl, pyrazolidinyl, pyrrolidinyl, tetrahydroindolyl, tetrahydroisoguinolinyl, tetrahydroguinolinyl, tetrahydroguinoxalinyl, tetrahydro-2H-1,4-thiazinyl, and thiomorpholinyl; and Z is O or S.