Patent ID: 7947691

Claim:
A compound of the formula where X and Y may be C, O or S provided that one of X and Y must be C; R 1 which is present when X is C is selected from the group consisting of H, aryl, heteroaryl, wherein said heteroaryl is selected from the group consisting of furyl, thienyl, pyridyl, pyrrolyl, oxazolyl, thiazolyl, imidazolyl, pyrazolyl, 2-pyrazolinyl, pyrazolidinyl, isoxazolyl, isothiazolyl, 1,2,3-oxadiazolyl, 1,2,3-triazolyl, 1,3,4-thiadiazolyl, pyridazinyl, pyrimidinyl, pyrazinyl, 1,3,5-triazinyl, 1,3,5-trithianyl, indolizinyl, indolyl, isoindolyl, 3H-indolyl, indolinyl, benzo[b]furanyl, 2,3-dihydrobenzofuranyl, benzo[b]thiophenyl, 1H-indazolyl, benzimidazolyl, benzothiazolyl, purinyl, 4H-quinolizinyl, isoquinolinyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, 1,8-naphthridinyl, pteridinyl, carbazolyl, acridinyl, phenazinyl, phenothiazinyl, phenoxyazinyl, pyrazolo[1,5-c]triazinyl, alkyl, alkylaryl, fused aryl with R 2 , and fused cycloalkyl with R 2 ; R 2 is selected from the group consisting of H, aryl, heteroaryl, wherein said heteroaryl consists of C, N, O and S atoms, alkyl, alkylaryl, fused aryl with R 1 or R 3 , and fused cycloalkyl with R 1 or R 3 ; R 3 which is present when Y is C is selected from the group consisting of H, aryl, heteroaryl, wherein said heteroaryl consists of C, N, O and S atoms, alkyl, alkylaryl, fused aryl with R 2 , and fused cycloalkyl with R 2 ; and R 4 is selected from the group consisting of alkyl, aryl, heteroaryl, wherein said heteroaryl consists of C, N, O and S atoms, and alkylaryl; or a pharmaceutically acceptable salt or isomer thereof.