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(±)-Peniorthoesters A and B, Two Pairs of Novel Spiro-Orthoester en-antiomers With an Unusual 1,4,6-Trioxaspi-ro[4.5]decane-7-One Unit From Penicillium minioluteum.

Xiaorui Liu | Chunmei Chen | Yinyu Zheng | Mi Zhang | Qingyi Tong | Junjun Liu | Qun Zhou | Jianping Wang | Zengwei Luo | Hucheng Zhu | Yonghui Zhang
Frontiers in chemistry | 2018

(±)-Peniorthoesters A and B (±1 and ±2), two pairs of unprecedented spiro-orthoester enantiomers with a 1,4,6-trioxaspiro[4. 5]decane-7-one unit, were obtained from Penicillium minioluteum. Their structures were determined by spectroscopic methods, X-ray diffraction analyses, and ECD calculations. (±)-Peniorthoesters A and B are the first examples of spiro-orthoester enantiomers, and they represent the first spiro-orthoesters originating from fungi. All compounds showed potential inhibitory activities comparable to dexamethasone against NO production with IC50 values ranging from 14.2 to 34.5 μM.

Pubmed ID: 30581815

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RAW 264.7 (tool)

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