Compounds of general formula:[Chemical formula should be inserted here. Please see paper copy] wherein R1, R2, and R3 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.
通式化合物:[
化学式应在此处插入。请参阅纸质副本]其中R1、R2和R3如规范中定义,以及其盐、对映体和包括该化合物的药物组合物已经制备。它们在治疗中很有用,特别是在疼痛管理中。