Assuming it is possible to create an acid anhydride from two different carboxylic acids (ie. one carboxylic acid molecule from each each per anhydride molecule), how would you name it?
Here's how you do it.
You name mixed anhydrides (anhydrides of different monobasic acids) by writing in alphabetical order the acid portions of the names followed by the word "anhydride."
Thus, you get the name,