Gram-Scale Purification of Flavonolignan Diastereoisomers from Silybum marianum (Milk Thistle) Extract in Support of Preclinical in vivo Studies for Prostate Cancer Chemoprevention - Graf, Tyler N; Wani, Mansukh C; Agarwal, Rajesh; Kroll, David J; Oberlies, Nicholas H (Planta Medica, 2007)