Four novel anthraquinone derivatives, named Dendryol A, B, C, and D, were isolated from the culture filtrate of Dendryphiella sp. Their structures were elucidated from spectral data and single-crystal X-ray diffraction analysis. The four compounds showed phytotoxic activity against barnyardgrass at more than 1 μl application of 5000 μg/ml.

中文翻译：

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Dendryol A、B、C 和 D，由杂草致病真菌 Dendryphiella sp. 产生的四种新化合物。

从 Dendryphiella sp. 的培养物滤液中分离出四种新型蒽醌衍生物，分别命名为 Dendryol A、B、C 和 D。从光谱数据和单晶 X 射线衍射分析阐明了它们的结构。四种化合物在超过 1 μl 的 5000 μg/ml 应用中显示出对稗草的植物毒性活性。