N-Oxalylglycine is the organic compound with the formula HO2CC(O)NHCH2CO2H.

This colourless solid is used as an inhibitor of α-ketoglutarate-dependent enzymes.

[1] It is isosteric with α-Ketoglutaric acid.

Such enzymes are pervasive and, for example, are required for the synthesis of 4-hydroxyproline.