The present invention provides compounds of Formula I, or pharmaceutically acceptable salts thereof, that are inhibitors of voltage-gated sodium channels, in particular Nav 1.7. The compounds are useful for the treatment of diseases treatable by inhibition of sodium channels such as pain disorders. Also provided are pharmaceutical compositions containing compounds of the present invention.本發明提供式I化合物或其醫藥學上可接受之鹽,其為電壓門控鈉通道、尤其Nav 1.7之抑制劑。該等化合物適用於治療可藉由抑制鈉通道治療之疾病,諸如疼痛病症。亦提供含有本發明之化合物之醫藥組合物。