Novel 4-O-β-d-xylopyranosyl-3,6-anhydro-l-galactopyranosyl disaccharide units in a polysaccharide from the red alga Pyrophyllon subtumens. - Falshaw R; Furneaux RH; Sims IM; Hinkley SFR; Kidgell JT; Bell TJ (Carbohydrate polymers, 2023)