purpurin1,2,4-Trihydroxyanthrachinon1,2,4-trihydroxy-9,10-anthracenedione1,2,4-trihydroxy-9,10-anthraquinone1,2,4-trihydroxyanthra-9,10-quinone1,2,4-trihydroxyanthraquinoneAlizarin purpurinC.I. 58205PrPurpurinhydroxylizaric acidpurpurinesmoke Brown Gverantin