@article{liu_shu_wang_fang_huang_xi_zheng_2013,  title={Preparative separation of C19-diterpenoid alkaloids from Aconitum carmichaelii Debx by pH‑zone-refining counter-current chromatography},  volume={36},  ISSN={0100-4042},  url={https://doi.org/10.1590/S0100-40422013000900015},  DOI={10.1590/S0100-40422013000900015},  number={9},  journal={Química Nova},  publisher={Sociedade Brasileira de Química},  author={Liu, Dahui and Shu, Xikai and Wang, Xiao and Fang, Lei and Huang, Luqi and Xi, Xingjun and Zheng, Zhenjia},  year={2013},  pages={1366–1369} }