enediol

ene·di·ol

(ēn-dī'ōl), The atomic arrangement -C(OH)=C(OH)- produced by proton migration from the CH of a -CHOH group that is attached to a -CO- group to the oxygen of the -CO- group (usually induced by alkali), giving rise to doubly bonded carbon atoms (the -ene group), each bearing a -CHOH group (a diol); a special case of enolization.