2,3-Dimethylmaleic anhydride is an organic compound with the formula (CH3)2C2(CO)2O.

[1] It is related to maleic anhydride (MA) by replacement of the two CH units with CCH3 groups.

The compound can be prepared from two eqiuvalents of MA in the presence of 2-aminopyridine followed by treatment with sulfuric acid.

[2][3] It has been evaluated as a comonomer.

[4] It occurs in some plants.