@article{li_zhang_lin_wang_fang_geng_zhang_2013,  title={Preparative separation and purification of bufadienolides from ChanSu by high-speed counter-current chromatography combined with preparative HPLC},  volume={36},  ISSN={0100-4042},  url={https://doi.org/10.1590/S0100-40422013000500013},  DOI={10.1590/S0100-40422013000500013},  number={5},  journal={Química Nova},  publisher={Sociedade Brasileira de Química},  author={Li, Jialian and Zhang, Yongqing and Lin, Yunliang and Wang, Xiao and Fang, Lei and Geng, Yanling and Zhang, Qinde},  year={2013},  pages={686–690} }