A new chromanone acid from the stem bark of Calophyllum teysmannii

@article{Lim2015ANC,
  title={A new chromanone acid from the stem bark of Calophyllum teysmannii},
  author={C. Lim and Hemaroopini Subramaniam and Y. Say and V. Jong and Hamid Khaledi and C. Chee},
  journal={Natural Product Research},
  year={2015},
  volume={29},
  pages={1970 - 1977}
}
A new chromanone acid, namely caloteysmannic acid (1), along with three known compounds, calolongic acid (2), isocalolongic acid (3) and stigmasterol (4) were isolated from the stem bark of Calophyllum teysmannii. All these compounds were evaluated for their cytotoxic and antioxidant activities in the MTT and DPPH assays, respectively. The structure of compound 1 was determined by means of spectroscopic methods including 1D and 2D NMR experiments as well as HR-EIMS spectrometry. The… Expand
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