muconic

from The Century Dictionary.

• Noting an acid, a colorless compound, HOCOCH:CH.CH:CHCOOH, prepared by the action of alcoholic potassium hydroxid on 3, 4-dibromadipic acid. It crystallizes in small needles and decomposes at about 320° C.

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Chem.) Of, pertaining to, or designating, an organic acid (C6H6O4, 2-4-hexadienedoic acid), obtained indirectly from mucic acid, and somewhat resembling itaconic acid. Various other means of synthesis have been reported.