Compounds of general formula:[Chemical formula should be inserted here. Please see paper copy] wherein R
1
, R
2
, and R
3
are as defined in the specification, as well as salts, enantiomers thereof and pharmaceutical compositions including the compounds are prepared. They are useful in therapy, in particular in the management of pain.
通式为:[此处应插入
化学式。 请参见纸质副本]的化合物,其中 R
1
, R
2
和 R
3
以及盐类、其对映体和包括这些化合物的药物组合物。它们可用于治疗,尤其是疼痛治疗。