| 摘要 |
The invention refers to compounds of general formula (I) wherein the R groups are, independently, H, C1-6alkyl, aryl, CF3; Y is CH2, C=O; X is bond, C=O, SO2, or C=N-CN; m is 0, 1; n is 0, 1; A is a heterocycle, or a phenyl group optionally substituted as defined in the specification. The compounds are active on chronic pain conditions of different origin; they can be administered alone or with other drugs. Most of these compounds are new. The invention include a process to prepare said compounds, and pharmaceutical compositions suitable for their administration to a patient.
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