(S)-5,8-Dihydroxy-2-(1-hydroxy-4-methylpent-3-enyl)-1,4-naphthoquinone 1,4-Naphthalenedione, 5,8-dihydroxy-2-(1-hydroxy-4-methyl-3-pentenyl)-, (S)- (9CI) 517-88-4 Alkanet extract (VAN) Alkanna red (VAN) Alkannin Alkannin (VAN) Anchusa acid (VAN) Anchusin (VAN) C.I. 75530 (VAN) C.I. Natural Red 20 (VAN) EINECS 208-245-7 NSC 407295 NSC 94524