Eight new complex flavanones with a novel linkage, cryptoyunnanones A–H (1–8), together with four known α-pyrones, were isolated from the leaves and twigs of Cryptocarya yunnanensis. The structures of 1–8 including their absolute configurations were characterized by spectroscopic data analysis and single-crystal X-ray crystallography. Plausible biosynthetic pathways for the formation of compounds 1–8 were proposed. Compounds 1–4 exhibited cytotoxicity against HCT-116, MDA-MB-231, and PC-3 cancer cells with IC₅₀ values from 6.4 to 9.1 μM.

中文翻译：

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Cryptoyunnanones A–H, 来自云南Cryptocarya yunnanensis的复合黄烷酮

八吨具有新颖联动新的复杂的黄烷酮，cryptoyunnanones A-H（1 - 8），加上四个已知α吡喃酮，从的树叶和树枝分离厚壳南松。的结构1 - 8通过光谱数据分析和单晶X射线晶体学，包括它们的绝对构型进行了表征。合理的生物合成途径的化合物形成的1 - 8提出。化合物1 – 4表现出对 HCT-116、MDA-MB-231 和 PC-3 癌细胞的细胞毒性，IC ₅₀值为 6.4 至 9.1 μM。