Patent ID: 8232290

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 Ra 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; a, b, c, d, x are carbon; or a pharmaceutically acceptable salt or solvate thereof.