(Rac)-Arnebin 1 ((Rac)-β,β-Dimetlacrylalkannin) is the racemate of β,β-Dimetlacrylalkannin and/or β,β-Dimetlacrylshikonin. β,β-Dimetlacrylalkannin and β,β-Dimetlacrylshikonin are napthoquinones isolated from Arnebia nobilis. β,β-Dimetlacrylshikonin has anti-tumor activity[1].
[1]. Zeng Z, et al. Arnebin-1 promotes angiogenesis by inducing eNOS, VEGF and HIF-1α expression through the PI3K-dependent pathway. Int J Mol Med. 2015 Sep;36(3):685-97.