This invention is directed to a compound of formula (I):wherein R1, R2 and R3 are as defined herein, a pharmaceutical composition comprising the compound, intermediates and processes for making said compounds, and the use of the compound to treat allergic and/or inflammatory disorders, particularly disorders such as allergic rhinitis, asthma, chronic obstructive pulmonary disease (COPD) and age-related macular degeneration (AMD).本發明係針對一種式(I)化合物:其中R1、R2和R3如本文所定義,一種含有此化合物的醫藥組成物、製備上述化合物的中間體和方法,以及使用此化合物治療過敏性和/或發炎性疾病之用途,尤其是例如過敏性鼻炎、哮喘、慢性阻塞性肺病(COPD)以及年齡相關黃斑變性(AMD)之疾病。