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Cytotoxic aspidofractinine alkaloids from Kopsia hainanensis
Ying Wang1, Lei Hang2, Li Jiao3
1Department of Gastroenterology, The First Hospital of Jilin University, Changchun 130021, China.
Abstract:
Five new aspidofractinine-type alkaloids, kopsiahainins A-E (1-5), were isolated from a 80% EtOH extract of the leaves and stems of Kopsia hainanensis. Structural elucidation of all the compounds were performed by spectral methods such as 1D- and 2D-NMR, IR, UV, and HR-ESI-MS. Alkaloids 3 and 4 exhibited some cytotoxic activity against all of six tested tumor cell lines (BGC-823, HepG2, MCF-7, SGC-7901, SK-MEL-2, and SK-OV-3) with IC50 values of 7.3-9.5μM and 9.2-10.6μM, respectively.
