The invention relates to compounds of formula (I),and pharmaceutically acceptable salts thereof, wherein R1to R7, A, Y and L are as defined herein. The invention also relates to pharmaceutical compositions comprising these compounds, methods of using these compounds in the treatment of various diseases and disorders, processes for preparing these compounds and intermediates useful in these processes.本發明係關於式(I)化合物，及其醫藥上可接受之鹽，其中R1至R7、A、Y及L係如本文所定義。本發明亦關於包含此等化合物之醫藥組合物、使用此等化合物來治療各種疾病及病症之方法、用於製備此等化合物之方法，及可用於此等方法中之中間體。
