| Product name： | Purpurin |
| Synonym： | Madder purple; Verantin; Oxylizarinic acid |
| Purity： | 98% + by HPLC |
| Appearance： | |
| Chemical Family： | |
| Canonical SMILES： | OC1C=C(O)C(O)=C2C=1C(=O)C1C=CC=CC=1C2=O |
| Botanical Source： | Found in madder root as glucoside, common plant pigment. tissue cultures of Galium mollugo and Cinchona ledgeriana |