SULPHATED POLYSACCHARIDES OF GRATELOUPIACEAE FAMILY .3. A POLYSACCHARIDE FROM PHYLLYMENIA CORNEA

Phyllymenia cornea, a red seaweed of the Grateloupiaceae yielded a sulphated polysaccharide phyllymenan, which, on acid hydrolysis, gave d-galactose, 2-O-methyl-d-galactose, 4-O-methyl-p-galactose, 6-O-methylgalactose, and xylose. Alkali treatment of phyllymenan indicated that all of the sulphate units were alkali-stable. Periodate-oxidation studies on phyllymenan, and on both partially and fully desulphated phyllymenan, indicated that no α-glycol groups were formed during desulphation. Partial hydrolysis of phyllymenan resulted in the isolation and characterisation of 4-O-β-d-galactopyranosyl-d-galactose and 4-O-β-d-galactopyranosyl-2-O-methyl-d-galactose. © 1969.