TY - JOUR T1 - Preparative isolation and purification of two new isomeric diterpenoid alkaloids from Aconitum coreanum by high-speed counter-current chromatography. AU - Tang,Qingfa, AU - Liu,Jinghan, AU - Xue,Jiao, AU - Ye,Wencai, AU - Zhang,Zunjian, AU - Yang,Chunhua, Y1 - 2008/07/30/ PY - 2008/04/10/received PY - 2008/07/17/revised PY - 2008/07/23/accepted PY - 2008/8/12/pubmed PY - 2008/10/29/medline PY - 2008/8/12/entrez SP - 181 EP - 5 JF - Journal of chromatography. B, Analytical technologies in the biomedical and life sciences JO - J Chromatogr B Analyt Technol Biomed Life Sci VL - 872 IS - 1-2 N2 - Preparative high-speed counter-current chromatography (HSCCC) coupled with evaporative light scattering detection (ELSD) was used to isolate and separate bioactive constituents from the roots of Aconitum coreanum. Two new diterpenoid alkaloid isomers were successfully separated for the first time by HSCCC with an optimized two-phase solvent system composed of ethyl acetate-n-butanol-methanol-2% acetic acid (3.5:1.5:2:4.5, v/v/v/v), 25.4 mg of GFT (1) and 18.3 mg of GFU (2) were isolated form 1 g crude extract in one step HSCCC experiment. The purities of the two new compounds were all over 95% as analyzed by HPLC and their structures were identified by ESI-MS, (1)H NMR, (13)C NMR, and 2D NMR analysis. SN - 1570-0232 UR - https://www.unboundmedicine.com/medline/citation/18692446/Preparative_isolation_and_purification_of_two_new_isomeric_diterpenoid_alkaloids_from_Aconitum_coreanum_by_high_speed_counter_current_chromatography_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1570-0232(08)00570-9 DB - PRIME DP - Unbound Medicine ER -