Compounds represented by Formula (I) or pharmaceutically acceptable salts thereof, are effective as NMD NR2B antagonists useful for treating conditions such as, for example, Parkinson's disease, Alzheimer's disease, migraine, epilepsy and pain.
                            由公式(I)所表示的化合物或其药学上可接受的盐,作为NMD NR2B拮抗剂具有疗效,可用于治疗帕
金森病、阿尔茨海默病、偏头痛、癫痫和疼痛等疾病。