4-dehydro-beta-D-glucosyl-poly[(1->4)-beta-D-glucosyl]
4-dehydro-beta-d-glucosyl-poly[(1->4)-beta-d-glucosyl]
A β-<small>D</small>-glucan consisting of (1→4)-β-<small>D</small>-glucan in which the residue at the non-reducing end has undergone formal dehyderogenation resulting on conversion of the hydroxy group at position 4 to the corresponding ketone.