Lobarioid A (1), an unusual depsidone possessing an eight-membered diether ring, was isolated from the edible lichen Lobaria sp. Its structure was elucidated by extensive NMR, MS, IR and single-crystal X-ray diffraction analyses. Compound 1 exhibited antibacterial activity against three strains of gram-positive bacteria.

中文翻译：

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Lobarioid A，一种不寻常的抗菌二烯酮，具有可食地衣Lobaria sp。的八元二醚环。

从食用地衣Lobaria sp。中分离出Lobarioid A（1），这是一种不寻常的具有8个成员二醚环的地普酮。通过广泛的NMR，MS，IR和单晶X射线衍射分析阐明了其结构。化合物1显示出对三种革兰氏阳性细菌的抗菌活性。