Curcuminoids chemical structure

FIGURE 5.2.1 Chemical structures of curcuminoid pigments and some aroma compounds of turmeric. 

A new curcuminoid, cyclocurcumin, possessing nematocidal activity, was isolated from the mother liquor by repeated purification as a yellow gum (Kiuchi et al, 1993). It had the same molecular formula as curcumin, but differed in structure by an intramolecular Michael addition of the enol-oxygen to the enone group. The chemical structures of these components are given in Fig. 6.2. 

Figure 6.3 Chemical structures of curcuminoids, resveratrol, and gallates.

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