1,3,6-Trihydroxy-2-methyl-9,10-anthraquinone-3-O-(6'-O-acetyl)-beta-D-xylopyranosyl-(1->2)-beta-D-glucopyranoside ( Compound 20) is a quinone compound that can be isolated from the roots and rhizomes of Madder.
References:
[1]. Wang Z, et al. Rubipodanones A-D, naphthohydroquinone dimers from the roots and rhizomes of Rubia podantha. Phytochemistry. 2018 Jan;145:153-160.
















