oxane-2,6-dionewater⟶pentanedioic acidReverse reactionsAutocondensation of pentanedioic acid (glutaric acid) to oxane-2,6-dione (glutaric anhydride)Potentially competingAutocondensation of pentanedioic acid (glutaric acid) to oxane-2,6-dione (glutaric anhydride)LessonsReactions of Acid Anhydrides