Journal of Tropical Oceanography >
Study on the secondary metabolites of marine fungus Phaeospheriopsis sp. ZYX-Z-811
Copy editor: YIN Bo
Received date: 2023-07-10
Revised date: 2023-08-25
Online published: 2023-09-07
Supported by
Special Finance Project of Ministry of Agriculture and Rural Affairs(NFZX2021)
Special Project of the Ministry of Finance and the Ministry of Agriculture and Rural Affairs on the National Modern Agricultural Industrial Technology System(CARS-21)
Special projects for the reform of public scientific research institutions(ITBBQDF2023004)
The secondary metabolites of marine fungus Phaeosporiopsis sp. ZYX-Z-811 were isolated and identified, and their biological activities were evaluated. The compounds were separated and purified by Silica gel, C18, Sephadex LH-20 column chromatography and high performance liquid chromatography (HPLC), ten compounds were separated, and their structures were identified by NMR, IR and UV spectroscopic methods. Ten compounds were identified as 4-epi-lignicol (1), lignicol (2), 6-demethylkigelin (3), 6, 8-dihydroxy-3, 4, 7-trimethylisocoumarin (4), 6, 7-dimethoxymellein (5), musaone A (6), 2-(4-hydroxyphenyl)ethylacetate (7), 3-indole formaldehyde (8), indole-3-acetic acid methyl ester (9), methyl p-hydroxybenzoate (10), among which compound 1 was not published in journal, and the absolute configuration was determined by ECD calculation. These compounds were evaluated for antioxidant activity and α-glucosidase in hibitoryactivity, respectively, compound 10 showed weak antioxidant activities.
QUAN Miaomiao , MA Qingyun , YANG Li , XIE Qingyi , DAI Haofu , HAO Yu’e , ZHAO Youxing . Study on the secondary metabolites of marine fungus Phaeospheriopsis sp. ZYX-Z-811[J]. Journal of Tropical Oceanography, 2024 , 43(2) : 121 -127 . DOI: 10.11978/2023095
表1 化合物1和化合物2的1H-和13C-NMR数据(500MHz、125MHz, DMSO-d6)Tab. 1 1H- and 13C-NMR data of compound 1 and compound 2 (500/125 MHz, DMSO-d6) |
碳位 | 化合物1 | 化合物2 | ||
---|---|---|---|---|
δC | δH | δC | δH | |
1 | 169.3 | 169.0 | ||
3 | 78.1 | 4.63, qd (J=6.5, 2.0Hz) | 80.0 | 4.45, m |
4 | 65.2 | 4.34, d (J=2.1Hz) | 67.7 | 4.38, d (J=5.2Hz) |
5 | 138.2 | 139.8 | ||
6 | 107.4 | 6.46, s | 105.8 | 6.65, s |
7 | 157.0 | 158.0 | ||
8 | 134.5 | 134.4 | ||
9 | 155.6 | 156.0 | ||
10 | 99.9 | 99.6 | ||
11 | 15.8 | 1.35, d (J=6.5Hz) | 18.1 | 1.35, d (J=6.0Hz) |
12 | 59.9 | 3.71, s | 60.3 | 3.70, s |
注: s: 单峰; m: 三重峰; d: 双重峰; qd: 四重峰; J: 耦合常数。空白表示季碳(没有连氢) |
图2 化合物1的1H-1HCOSY和HMBC (a)、ROESY (b)相关信号Fig. 2 Key 1H-1HCOSY, HMBC (a) and ROESY (b) correlations of compound 1 |
表2 化合物1~10对DPPH清除率Tab.2 DPPH clearance rate of compounds 1 ~ 10 |
化合物 | 清除率/% |
---|---|
4-epi-lignicol | 25.2 |
lignicol | 12.7 |
6-demethylkigelin | 16.2 |
6,8-dihydroxy-3,4,7-trimethylisocoumarin | 17.8 |
6,7-dimethoxymellein | 25.8 |
musaone A | 6.9 |
2-(4-hydroxyphenyl)ethylacetate | 25.8 |
3-吲哚甲醛 | 18.9 |
吲哚-3-乙酸甲酯 | 2.1 |
对羟基苯甲酸甲酯 | 50.6 |
抗坏血酸 | 96.8 |
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