Structure of Narcissus tazetta Glucomannan

Naturally acetylated glucomannan with MW 31,000 and []_D²⁰ -29.1° was isolated from bulbs of Narcissus tazetta L. Chemical methods and IR and ¹³C NMR spectroscopies were used to show that the polysaccharide contains 12.9% O-Ac groups and consists of D-mannose and D-glucose in a 1:5.6 ratio that form a linear polymer through -1,4-glycoside bonds.