What is the chemical composition of sisal fiber?

The sisal fiber consists of the following elements by weight: 55-65% of cellulose, 10-15% of hemicelluloses and 10-20% of lignin, 2-4% of pectin, 1-4% of water soluble materials, 0.15-0.3% of fat and wax and 0.7-1.5 % of ash.