Figure 1. Structure of the main three compounds in curcumin ethanolic extract (curcumin (a), demethoxycurcumin (b) and bisdemethoxycurcumin (c))

From

Anti-inflammatory Activities of Ethanolic Extracts of curcuma Longa (Turmeric) and cinnamon (Cinnamomum verum)

Khaled Qabaha, Saleh Abu-Lafi, Fuad Al-Rimawi

Journal of Food and Nutrition Research. 2017, 5(9), 668-673 doi:10.12691/jfnr-5-9-6