✍ Scribed by Kui-Wu Wang; Hong Zhang; Yuan-Jiang Pan
No coin nor oath required. For personal study only.
Two unprecedented norfriedelane‐type triterpenoids, triflora lactone (1) and triptocalline B (2), were isolated from the MeOH extract of the stalks of Microtropis triflora Merr. et Freem., together with five known compounds (3–7). Their structures were elucidated on the basis of spectroscopic and mass‐spectrometric data (Tables 1 and 2). The new compounds were found to be cytotoxic against human cervical squamous carcinoma (Hela) cells, with IC~50~ values of 21.6 and 17.6 μg/ml, respectively.
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