Six dendrobine-type alkaloids were isolated from the tubes of by silica gel, Sephadex LH-20 gel column chromatography, and preparative HPLC. Compound is a new alkaloid containing a pair of amide tautomers, whereas compound is a new dendrobine-type alkaloid. By using spectroscopic techniques including 1 D and 2 D NMR, the structures of compounds were identified as -methoxylcarbonyldendrobine (), dendronboic acid (), dendrobine (), 6-hydroxyldendrobine (), dendrobine -oxide (), and denrine (). The cytotoxic effects of the isolated compounds on two human tumour cell lines (HCT-116 and SW1990) were evaluated using MTT assay.
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| http://dx.doi.org/10.1080/14786419.2021.2019731 | DOI Listing |
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