GUM POLYSACCHARIDES OF 9 SPECIMENS OF LAGUNCULARIA-RACEMOSA

Gum exudates from nine specimens of Laguncularia racemosa (Combretacea e) from Venezuela were examined. The constituent sugars found were gal actose, arabinose, rhamnose, galacturonic acid, glucuronic acid and it s 4-O-methyl ether. The results obtained are similar to those in many Combretum gums studied; giving acidic solutions, their nitrogen conten t tends to be low and their rhamnose content, after acidic hydrolysis, tends to be high. The gum, in deuterium oxide, shows a well resolved (CNMR)-C-13 spectrum.