8Joseph P, Jaiswal, A. K. Hydroquinones cause specific mutations and lead to ellular transformation and in vivo tumorigenesis Br J Cancer 1998,78(3) :312～320.
9Han Y,Bu LM,Ji X,et al.Modulation of multidrug resistance by andrographolid in a HCT-8/5-FU multidrug-resistant colorectal cancer cell line[J].Chin J Dig Dis,2005,6(2):82-86.
10Chou TC,Guan Y,Soenen DR,et al.Potent reversal of multidrug resistance by ningalins and its use in drug combinations against human colon carcinoma xeno-graft in nude mice[J].Cancer Chemother Pharmacol,2005,56(4):379-390.
