3,6-Anhydrogalactose article 12 priority journal 12 galactose 8 unclassified drug 8 Carbohydrate Conformation 6 Carrageenans 6 Disaccharides 6 Galactose 6 Molecular mechanics 6 polysaccharide 6 quantum mechanics 6 seaweed 6 3,6 anhydrogalactose 4 Biopolymers 4 Carbohydrates 4 Conformations 4 Glycosides 4 MM3 4 Magnetic Resonance Spectroscopy 4 Models, Chemical 4 Molecular Conformation 4 Molecular Structure 4 Polysaccharides 4 Puckering 4 Thermodynamics 4 carbohydrate analysis 4 chemical structure 4 diastereoisomer 4 disaccharide 4