Table 1.

Quantification of acetylshikonin in nine species of Zicao.

Plant ( family Boraginaceae)	Content (mg/g)	Source (provinces of China)	Reference
Arnebia euchroma (Royle) Johnst.	19.7 ± 0.66	Xinjiang	Hu et al. 2006
Arnebia guttata Bunge	1.36 ± 0.04	Xinjiang	Hu et al. 2006
Lithospermum erythrorhizon Sieb. et Zucc.	7.49 ± 0.11	Jilin	Hu et al. 2006
Onosma paniculatum Bur. et Franch.	2.86 ± 0.03	Yunnan	Hu et al. 2006
Onosma waltonii Duthic	2.60 ± 0.13	Tibet	Hu et al. 2006
Onosma hookerii Clarke	0.747 ± 0.01	Tibet	Hu et al. 2006
Onosma exsertum Hemsl.	0.485 ± 0.01	Yunnan	Hu et al. 2006
Onosma hookerii Clarke var. longiflorum Duthie	0.248 ± 0.01	Tibet	Hu et al. 2006
Onosma confertum W.W. Smith	0.123 ± 0.002	Yunnan	Hu et al. 2006