The two sugar moieties were finally identified as D-glucose and L-rhamnose
due to acidic hydrolysis of compound 1 followed by comparative TLC of the hydrolyzed sugars with the authentic samples of glucose and rhamnose and their optical rotation values [[alpha]]D20 + 50.
Methyl [alpha]-L-rhamnopyranoside (2): The title compound (2) was prepared from L-rhamnose
(Merck) and anhydrous methanol with Amberlite IR 120 ([H.
The sugars included: D-Xylose, L-Rhamnose
, Sucrose, Lactose, Melibiose, Raffinose, Melezitose, Glycerol, Adonitol, Sorbitol and Mannitol.
, and D-glucose are hereafter referred to as mannose, rhamnose, and glucose in the text.
Flaxseed gum contains two types of polysaccharide, a neutral arabinoxylan and a pectie-like acidic polysaccharide containing D-galactose, L-rhamnose
and D-galaeturonic acid.