Abstract

Two new protolimonoid compounds, namely, argentinin A (1) and B (2) along with five known triterpenoid compounds, dammar-24-en-3α-ol (3), 3-epi-cabraleahydroxy lactone (4), (E)-25-hydroperoxydammar-23-en-3β,20-diol (5), mixture of eichlerianic acid and shoreic acid (6a and 6b), and dammar-24-en-3α,20-diol (7), were isolated from the stem bark of Aglaia argentea. The structure of new compounds were elucidated by spectroscopic methods including one and two-dimensional NMR as well as high-resolution mass spectrometric analysis. All of the compounds were tested for their cytotoxic effects against P-388 murine leukemia cells in vitro. Among those isolated compounds, argentinin A (1) showed the strongest activity with an IC50 value of 1.27μg/mL (3.05μM).

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