Two new compounds, 3',5'-dimethyl-4',6'-dimethoxy-2'-hydroxydihydrochalcone (1) and 3',5'-dimethyl-6'- methoxy-2',4'-dihydroxydihydrochalcone (2), were isolated from the CHCl3 extract from Empetrum nigrum L. var. japonicum K. Koch. Their structures were elucidated by spectroscopic methods, including UV, IR, HR-ESI-MS, and extensive 1D and 2D NMR techniques.

中文翻译：

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来自 Empetrum nigrum var. 的两种新化合物。粳稻

两种新化合物，3',5'-二甲基-4',6'-二甲氧基-2'-羟基二氢查尔酮 (1) 和 3',5'-二甲基-6'-甲氧基-2',4'-二羟基二氢查尔酮 (2) )，是从 Empetrum nigrum L. var. 的 CHCl3 提取物中分离出来的。japonicum K. Koch。它们的结构通过光谱方法阐明，包括 UV、IR、HR-ESI-MS 以及广泛的 1D 和 2D NMR 技术。