Synonyms: 1,4-Naphthalenedione,5,8-dihydroxy-2-(1-hydroxy-4-methyl-3-pentenyl)- (9CI);1,4-Naphthoquinone,5,8-dihydroxy-2-(1-hydroxy-4-methyl-3-pentenyl)- (7CI);(?à)-5,8-Dihydroxy-2-(1-hydroxy-4-methyl-3-pentenyl)-1,4-naphthoquinone;(?à)-Alkannin;(?à)-Shikalkin;(?à)-Shikonin;NSC 291845;Shikalkin;