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chalcomoracin/dud
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Chalcomoracin and moracin C, new inhibitors of Staphylococcus aureus enoyl-acyl carrier protein reductase from Morus alba.
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Bacterial enoyl-acyl carrier protein (ACP) reductase has been confirmed as a novel target for antibacterial drug development. In the screening of inhibitors of Staphylococcus aureus enoyl-ACP reductase (FabI), we found that a methanol extract of leaves of Morus alba L. potently inhibited S. aureus
Mulberry Diels-Alder adducts: synthesis of chalcomoracin and mulberrofuran C methyl ethers.
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The synthesis of each of the heptamethyl ethers of the mulberry Diels-Alder adducts chalcomoracin (1) and mulberrofuran J (2) is described. The key steps in each approach involved a biomimetic intermolecular [4+2]-cycloaddition between a dehydroprenylphenol diene derived from an
Isoprenylated phenolic compounds with tyrosinase inhibition from Morus nigra.
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A new isoprenylated sanggenon-type flavanone, nigrasin K (1), together with three known analogs (2-4) and five known Diels-Alder adducts (5-9), were isolated from the twigs of Morus nigra. Their structures were elucidated by spectroscopic methods. Sanggenon M (2), chalcomoracin (5), sorocein H (6),
Diels-Alder adducts with PTP1B inhibition from Morus notabilis.
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Eight Diels-Alder adducts, morbilisins A-H (1-8), a known analogue, chalcomoracin (9), together with eleven known flavonoids and 2-arylbenzofurans, were isolated from the leaves of Morus notabilis. Their structures were elucidated by extensive spectroscopic analysis, including 1D, 2D NMR, MS, and
[Flavonoids from the leaves of Morus alba L].
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The investigation on the leaves of Morus alba L. was carried out to find the relationship of the constituents and the pharmacological activities. The isolation and purification were performed by various chromatographies such as silica gel, Sephadex LH-20, RP-C18 column chromatography and so on.
[Chemical constituents from cell cultures of Morus alba].
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The column chromatography on silica gel, Sephadex LH-20 and semi-preparative HPLC were used to separate and purify the compounds from the EtOAc extract of medium and MeOH extract of cell cultures of Morus alba. Eight compounds were isolated. Based on physico-chemical properties and spectroscopic
UV-B induced changes in the secondary metabolites of Morus alba L. leaves.
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Ultraviolet-B (UV-B) radiation is harmful to plants and human beings. Many secondary metabolites, like flavonoids, alkaloids, and lignin, are UV-B absorbing compounds, which can protect the genetic material of plants. Furthermore, they are active components of herbal drugs. UV-B radiation can
Potential cytotoxic Diels-Alder type adducts from liquid medium of Morus Alba var. shalun root cultures.
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A new Diels-Alder type adduct named morushalunin (1), together with three similar compounds, guangsangon E (2), chalcomoracin (3), and kuwanon J (4) were isolated from the EtOAc extract of liquid medium of Morus alba var. shalun root cultures. The structures
Chemistry and biosynthesis of isoprenylated flavonoids from Japanese mulberry tree.
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Many isoprenylated flavonoids have been isolated from Japanese mulberry tree (Moraceae). Among them, kuwanons G (1) and H (2) were the first isolated active substances exhibiting a hypotensive effect. These compounds are considered to be formed through an enzymatic Diels-Alder type reaction between
Three new cytotoxic Diels-Alder-type adducts from Morus australis.
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Three new natural products, australisines A-C (1-3, resp.), were isolated from the stem bark of Morus australis, together with eight related compounds, including mulberrofurans E-G, J, and Q, mongolicin C, chalcomoracin, and kuwanon G. Their structures were fully characterized by spectroscopic
Constituents of the cultivated mulberry tree.
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In addition to mulberrofuran C, a new 2-arylbenzofuran derivative, six flavonoid derivatives, cyclomorusin, morusin, kuwanon C, E, G and H, as well as a known 2-arylbenzofuran derivative, chalcomoracin, were isolated from extracts of root bark of the cultivated mulberry tree (a variety of Morus
Five new diels-alder type adducts from the stem and root bark of Morus mongolica.
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Five new Diels-Alder type adducts, mongolicins A - E, and nine known compounds, mongolicin F, chalcomoracin, mulberrofuran T, mulberrofuran G, mulberrofuran F, albanol B, kuwanon O, mulberrofuran H and kuwanon H, were isolated from the stem and root bark of Morus mongolica. Their structures were
Wittiorumins A - F, antioxidant diels-alder-type adducts from Morus wittiorum.
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Six new Diels-Alder-type adducts, wittiorumins A-F ( 1 - 6) along with the three known compounds chalcomoracin ( 7), mulberrofuran J ( 8), and mongolicin F ( 9), were isolated from the stem bark of Morus wittiorum. Their structures including their absolute configurations were determined on the basis
Isolation, Identification, and Quantification of Tyrosinase and α-Glucosidase Inhibitors from UVC-Irradiated Mulberry (Morus alba L.) Leaves.
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Methanol extracts from ultraviolet (UV) C-irradiated mulberry leaves (UVC-IML) exhibit stronger tyrosinase and α-glucosidase inhibitory activities than those from unirradiated mulberry leaves. Through a bioassay-guided fractionation and purification process, two oxyresveratrol derivatives,
Mulberry moracins: scavengers of UV stress-generated free radicals.
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Mulberry leaves treated with UV-C were found to accumulate three different phytoalexins, moracin C, moracin N, and chalcomoracin. The increased level of malondialdehyde in UV-treated leaves along with moracins suggested their role as a free-radical scavenger in stressed plants. All the three
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