1,4-Naphthalenedione, 5,8-dihydroxy-2-[(1R)-1-hydroxy-4-methyl-3-pentenyl]- 5,8-Dihydroxy-2-((R)-1-hydroxy-4-methyl-pent-3-enyl)-[1,4]naphthoquinone 517-89-5 AIDS-094462 AIDS094462 Isoarnebin 4 NSC252844 Shikonin Tokyo Violet