Phomopsichin A-D; Four New Chromone Derivatives from Mangrove Endophytic Fungus Phomopsis sp. 33.

Phomopsichin A-D; Four New Chromone Derivatives from Mangrove Endophytic Fungus Phomopsis sp. 33.
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DOI:
10.3390/md14110215
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发表时间:
2016-11-22
期刊:
影响因子:
5.4
通讯作者:
Lin Y
Lin Y
中科院分区:
医学2区
文献类型:
--
作者:
Huang M;Li J;Liu L;Yin S;Wang J;Lin Y

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从红树林内生真菌Phomopsis sp.的发酵产物中分离得到4个新的色酮类化合物Pomopsichin A-D(1-4)和一个已知化合物Pomoxanthone A(5)。33#。通过综合光谱分析结合单晶X射线衍射法或电子圆二色谱(ECD)理论计算,确定了它们的结构。它们的特点是一个三环框架,其中一个二氢吡喃环与色酮环相融合。化合物1-5对乙酰胆碱酯酶和α-葡萄糖苷酶的抑制活性较弱,对1,1-二苯基-2-苦基肼和羟基的清除作用较弱,抑菌活性较弱。化合物1-4对MDA-MB-435乳腺癌细胞无细胞毒活性。考虑到它们独特的分子结构,它们的其他生物活性值得进一步研究。
Four new chromone derivatives, phomopsichins A–D (1–4), along with a known compound, phomoxanthone A (5), were isolated from the fermentation products of mangrove endophytic fungus Phomopsis sp. 33#. Their structures were elucidated based on comprehensive spectroscopic analysis coupled with single-crystal X-ray diffraction or theoretical calculations of electronic circular dichroism (ECD). They feature a tricyclic framework, in which a dihydropyran ring is fused with the chromone ring. Compounds 1–5 showed weak inhibitory activities on acetylcholinesterase as well as α-glucosidase, weak radical scavenging effects on 1,1-diphenyl-2-picrylhydrazyl (DPPH) as well as OH, and weak antimicrobial activities. Compounds 1–4 showed no cytotoxic activity against MDA-MB-435 breast cancer cells. Their other bioactivities are worthy of further study, considering their unique molecular structures.
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