Keywords: Purpurin.png Chemical structure of Purpurin Author date of creation selfmade by Shaddack 4 November 2005 Source self-made Copyright Public Domain PD Comments b/w hires PNG; ChemDraw 1 2 4-trihydroxyanthracene-9 10-dione 200 svg Anthraquinone dyes Hydroxyanthraquinones |