algae 6 alpha galactose 6 sulfate article 6 controlled study 6 galactose 6 nonhuman 6 priority journal 6 seaweed 6 unclassified drug 6 3,6 anhydrogalactose 4 Chemical structure 4 Methylation analysis 4 NMR spectroscopy 4 Seaweed 4 Sulfur compounds 4 carbohydrate analysis 4 galactan 4 quantitative analysis 4 structure analysis 4 sulfate 4 xylose 4 2 o methyl alpha galactose 2 3,6 anhydro alpha galactose 2 3,6 anhydro alpha galactose 2 sulfate 2 3,6-Anhydrogalactose 2 Acanthophora 2 Acanthophora spicifera 2 Agarans 2 Alcohols 2 Algae, Red 2