Study on the mechanism of action of effective monomeric, berberine of Xianglian Pill in inhibiting human colon cancer cells based on fatty acid synthase target oleh Shi-ying Li, Yun Li, Zhong-hua Wu, Zhang-jie Zhou, Cun-ya Li, Ting-ting Wu, Shu-juan Fu, Zhi-ying Wang, Zhi-xian Zhong, Yi Zhong