Complete Assignments of NMR Spectral Data of Three C19-Diterpenoid Alkaloids

Complete Assignments of NMR Spectral Data of Three C19-Diterpenoid Alkaloids

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C19-diterpenoid alkaloids have complex and diverse structures, posing great challenges for nuclear magnetic resonance sex shop arles (NMR)-based structural elucidation.Three C19-diterpenoid alkaloids, including taronenine E (1), chasmaconitine (2) and vilmorisine (3), were isolated from the roots of Aconitum taronense Fletcher et Lauener, and analyzed by various here NMR spectroscopy methods (i.e., 1H and 13C NMR, DEPT, 1H-1H COSY, HSQC and HMBC).Complete assignments of the NMR chemical shifts were obtained, providing a good reference for the further research of C19-diterpenoid alkaloids.