[4)-3-O-Ac-alpha-D-GalpANAc(1->]n
[4)-3-o-ac-alpha-d-galpanac(1->]n
A galacturonan derivative that is a linear homopolymer of (1→4)-α-<small>D</small>-Gal<em>p</em>ANAc, variably <em>O</em>-acetylated at the 3-position.