Fig. 2.

(A) Main constituents of the Xanthorrhoea exudates based on the main pyrolysis products and information retrieved from the literature on the resin macromolecular structure (refs. 31, 32 and references therein). The exact position of methoxyl groups cannot be established given the analytical approach adopted in this study. (B) Main constituents of the Callitris exudates based on the main pyrolysis products. (C) Main constituents of the Eucalyptus exudates based on the main pyrolysis products and information retrieved from the literature on the kino macromolecular structure (33, 34). (D) Branched polysaccharide chain built with (–)– arabinose; (+)– galactose; (–)– rhamnose, and (+)– glucuronic acid, which are the monosaccharide constituents found in the Acacia gums. The polysaccharide structure cannot be determined with the techniques used in this study, and it is not reported in the literature. Inositol is only detected in Acacia sp.