1.广东海洋大学食品科技学院,广东 湛江 524088
2.中山大学化学学院,广东 广州510006
刘亚月(1989年生),女;研究方向:海洋生物活性物质;E-mail:liuyayue@gdou.edu.cn
佘志刚(1963年生),男;研究方向:天然产物化学;E-mail:cesshzhg@mail.sysu.edu.cn
纸质出版日期:2023-01-25,
网络出版日期:2022-07-13,
收稿日期:2022-04-17,
录用日期:2022-04-28
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刘亚月,冯昀铠,杨文聪等.广西山口红树内生真菌Alternaria sp.SK6YW3L中的蒽醌类化合物[J].中山大学学报(自然科学版),2023,62(01):131-141.
LIU Yayue,FENG Yunkai,YANG Wencong,et al.The anthraquinones of mangrove endophytic fungus Alternaria sp. SK6YW3L isolated from Guangxi Shankou[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2023,62(01):131-141.
刘亚月,冯昀铠,杨文聪等.广西山口红树内生真菌Alternaria sp.SK6YW3L中的蒽醌类化合物[J].中山大学学报(自然科学版),2023,62(01):131-141. DOI: 10.13471/j.cnki.acta.snus.2022C007.
LIU Yayue,FENG Yunkai,YANG Wencong,et al.The anthraquinones of mangrove endophytic fungus Alternaria sp. SK6YW3L isolated from Guangxi Shankou[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2023,62(01):131-141. DOI: 10.13471/j.cnki.acta.snus.2022C007.
研究了广西山口红树林自然保护区的红树植物无瓣海桑
Sonneratia apetala
来源内生真菌
Alternaria
sp. SK6YW3L的次级代谢产物。利用
w
=3%盐度的大米培养基对该菌株进行发酵培养,并综合运用正、反相硅胶柱层析,半制备HPLC,Sephadex LH-20凝胶层析和重结晶等分离手段,从中分离获得了13个蒽醌类化合物(
1
~
13
)。再利用1D/2D NMR和MS等现代波谱技术,并与文献波谱数据对比分析,鉴定化合物为:7-acetyl-1,3,6-trihydroxyanthracene-9,10-dione (
1
)、(11
S
)-1,3,6-trihydroxy-7-(1-hydroxyethyl)anthracene-9,10-dione (
2
)、7-
O
-demethyl-6-deoxybostrycoidin (
3
)、altersolanol A (
4
)、dactylariol (
5
)、altersolanol B (
6
)、emodin (
7
)、emodin-3-methyl ether (
8
)、6-hydroxy-aloeemodin (
9
)、anthraquinone A (
10
)、1,5-dihydroxy-7-methoxy-2-methylanthracene-9,10-dione (
11
)、alterporriol N (
12
)和alterporriol A (
13
)。采用铜靶单晶X-Ray衍射技术分析了化合物
1
和
4
的单晶结构,其中
1
为新单晶,并确定了化合物
4
的绝对构型为5
R
,6
S
,7
R
,8
S
。其他化合物的绝对构型通过比对文献和旋光试验和CD数据确定。活性结果显示,化合物
1
~
3
对
α
-葡萄糖苷酶表现出中等的抑制活性,IC
50
值分别为(210.1 ± 1.2), (125.8 ± 1.5)和(68.7 ± 1.3) μmol/L。
The secondary metabolites of endophytic fungus
Alternaria
sp. SK6YW3L were studied. The fungus was isolated from the fresh fruit of mangrove plant
Sonneratia apetala
collected from Guangxi Shankou Mangrove Nature Reserve. The strain was fermented and cultured with 3% salinity rice medium, and then subjected to silica gel column chromatography, semi-preparative HPLC, Sephadex LH-20, ODS and recrystallization. Thirteen anthraquinones including 7-acetyl-1,3,6-trihydroxyanthracene-9,10-dione (
1
), (11
S
)-1,3,6-trihydroxy-7-(1-hydroxyethyl)anthracene-9,10-dione (
2
), 7-
O
-demethyl-6-deoxybostrycoidin (
3
), altersolanol A (
4
), dactylariol (
5
), altersolanol B (
6
), emodin (
7
), emodin-3-methyl ether (
8
), 6-hydroxy -aloeemodin (
9
), anthraquinone A (
10
), 1,5-dihydroxy-7-methoxy-2- methylanthracene-9,10-dione (
11
), alterporriol N (
12
) and alterporriol A (
13
), were identified using modern spectroscopy techniques such as 1D, 2D NMR and MS, and then comparing with literature data. The single crystal structure of compounds
1
and
4
were analyzed by single-crystal X-Ray diffraction experiment using CuK
α
radiation. Among them, compound
1
was obtained as a new single crystal, and the absolute configuration of compound
4
was determined to be 5
R
, 6
S
, 7
R
, 8
S
. The absolute configurations of other compounds were determined by comparing optical rotation and CD data. In the bioactivity assay, compounds
1
-
3
exhibited
α
-glucosidase inhibitory activity with IC
50
values of (210.1 ± 1.2), (125.8 ± 1.5) and (68.7 ± 1.3) μmol/L, respectively.
红树林内生真菌Alternaria sp.次级代谢产物蒽醌化合物
mangroveendophytic fungusAlternaria sp.secondary metaboliteanthraquinones
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