Four new flavone derivatives (1–4), together with six known flavones (5-10), were isolated from the stems of Dracaena angustifolia. The complete structures of new compounds were elucidated by analyses of spectroscopic data and quantum chemistry calculations. Compounds 2, 9 and 10 displayed weak anti-inflammatory activity with IC₅₀ values of 45, 33 and 61 μM, respectively.

中文翻译：

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龙血树Dracaena angustifolia茎中的新黄酮

从Dracaena angustifolia的茎中分离出四种新的黄酮衍生物（1-4），以及六种已知的黄酮（5-10）。通过光谱数据分析和量子化学计算，阐明了新化合物的完整结构。化合物2，9和10显示微弱的抗炎活性用IC _50个分别为45，33和61μM，值。