Vassobia breviflora
Content: Withaferin A, a cytotoxic steroid
Literature
Samadi, Abbas K.;Withaferin A, a Cytotoxic Steroid from Vassobia breviflora, Induces Apoptosis in Human Head and Neck Squamous Cell Carcinoma;
J Nat Prod. 2010 September 24; 73(9): 1476–1481. doi:10.1021/np100112p.