The present invention provides compounds of the formula: which are useful as inhibitors of PHD, pharmaceutical compositions thereof, methods for treatment of conditions associated with HIF, processes for making the compounds and intermediates thereof.本發明提供下式化合物:其適用作PHD之抑制劑;其醫藥組合物;治療與HIF相關病狀之方法;用於製備該等化合物及其中間物之方法。