(2-Methylbutyryl)shikonin is a natural product from Lithospermum erythrorhizon Sieb. et Zucc.

52387-15-2

C21H24O6

372.41

(< 1 mg/ml refers to the product slightly soluble or insoluble )
Powder: -20°C for 3 years
In solvent: -80°C for 2 years