Patent ID: 8569334

Claim:
A compound of the general formula: wherein, R 1 is a mono- or bicycloalkylalkyl group; R 2 is selected from straight or branched C 1 -C 5 alkyl which may optionally substituted with —OH, C 1 -C 5 alkoxy, NH 2 —, N(R a ) 2 —,NHR a —, CN—, CF 3 , halogen, piperidino, morpholino, pyrrolidino, 5H-tetrazolylpropyl, methylcarbamoyl, dimethylcarbamoyl, or ethylmethylcarbamoyl, wherein R a is hydrogen or C 1 -C 5 alkyl; R 3 , R 4 , R 5 , R 6 , are at each occurrence independently selected from hydrogen, halogen, methyl, hydroxy, methoxy, cyano, or trifluoromethyl; and a, b, c, and d are carbon and x is nitrogen, or a, c, d, and x are carbon and b is nitrogen, or a, b, d, and x are carbon and c is nitrogen, or b, c, d, and x are carbon and a is nitrogen; or a pharmaceutically acceptable salt or solvate thereof.