Records of Natural Products
A scientific open acces journal in the field of natural products.
Records of Natural ProductsA scientific open acces journal in the field of natural products.
Secondary Metabolites of Ethanol Extracts of Pinus sylvestris Cones from Eastern Anatolia and Their Antioxidant, Cholinesterase and α-Glucosidase Activities
Scots pine (Pinus sylvestris) is the most widely distributed tree species among pine species. Antiradical, antioxidant properties and inhibition properties on butyrylcholinesterase (BChE), acetylcholinesterase (AChE) and α-glycosidase activities of ethanol extracts of P. sylvestris were reported from Sarikamis (Kars), Gumushane and Erzurum provinces of Turkey. The cones of P. Sylvestris from Gumushane showed the highest IC50 values in both DPPH. (14.75 µg/mL) and ABTS.+ (12.56 µg/mL) radical scavenging activities. An LC-HRMS method developed and the secondary metabolite composition of extracts were identified. The major compounds are determined as (+)-trans taxifolin, quercitrin, fumaric acid, (-) epicatechin, and nepetin-7-O-glucoside, apigenin-7-O-glucoside in P. sylvestris cones.DOI http://doi.org/10.25135/rnp.155.19.06.1326 (DOI number will be activated after the manuscript has been available in an issue.) Keywords Pinus sylvestris acetylcholinesterase butyrylcholinesterase antioxidant activity α-glucosidase LC-HRMS Available online: November 12, 2019 DETAILS DOWNLOAD PDF © ACG Publications. All rights reserved.
Diterpenoids and Sesquiterpenoids from Syzygium fluviatile
Abstract: A new monocyclic diterpenoid, cassipouryl formate, (1) together with three known diterpenoids (2−4) and five known sesquiterpenoids (5−9) were isolated from the twigs and leaves of Syzygium fluviatile. The new isolate was elucidated by various spectroscopic technologies. This was the first example of the chemical constituents from this species and the first report on the diterpenoids from genus Syzygium.DOI http://doi.org/10.25135/rnp.158.19.08.1393 (DOI number will be activated after the manuscript has been available in an issue.) Keywords Syzygium fluviatile Myrtaceae diterpenoids sesquiterpenoids. Available online: November 11, 2019 DETAILS DOWNLOAD PDF © ACG Publications. All rights reserved.
Two New 2(1H)-Pyrazinone Derivatives from the Plant Endophyte Streptomyces sp. KIB-H1992
Two new 2(1H)-pyrazinone derivatives, 3,6-diisopropyl-5-methylpyrazin-2(1H)-one (1) and 5-(hydroxymethyl)-3,6-diisopropylpyrazin-2(1H)-one (2), were isolated from the fermentation broth of endophytic actinomycete Streptomyces sp. KIB-H1992. Their structures were established based on the detailed spectroscopic analyses, including ESI-MS, HR-ESI-MS, 1D- and 2D NMR spectra.DOI http://doi.org/10.25135/rnp.154.1907.1355 (DOI number will be activated after the manuscript has been available in an issue.) Keywords 2(1H)-pyrazinone derivatives endophytic actinomycete Streptomyces sp. spectroscopic analyses Available online: November 05, 2019 DETAILS DOWNLOAD PDF © ACG Publications. All rights reserved.
α-Pinene, Caryophyllene and β-Myrcene from Peucedanum terebinthaceum Essential oil: Insecticidal and Repellent Effects on Three Stored-Product Insects
The aim of this work was to evaluate the bioactivities of Peucedanum terebinthaceum (Fisch.) Fisch. ex Turcz. essential oil and its three second rich constituents against Tribolium castaneum Herbst, Lasioderma serricorne Fabricius and Liposcelis bostrychophila Badonnel. The essential oil from aerial part of P. terebinthaceum was obtained by hydrodistillation and analyzed by gas chromatography-mass spectrometry. Thirty-three constituents were confirmed by GC-MS, which accounting for 91.5% of the total oil. The principal constituents included β-thujene (21.4%), β-terpinene (11.8%), germacrene D (9.4%) and dihydro-cis-α-copaene-8-ol (8.0%). Besides, β-myrcene (6.2%), Linalyl isovalerate (4.3%), α-pinene (4.0%), caryophyllene (3.6%), (Z)-α-farnesene (3.6%) and β-elemene (3.0%) were also detected in relatively lower content. The essential oil possessed promising potential in pest control, as it showed strong contact toxicity and repellent effects on T. castaneum and L. serricorne. Three major constituents α-pinene, caryophyllene and β-myrcene were toxic to three insect species in contact assays and showed repellent effects on T. castaneum and L. bostrychophila. This work revealed the insecticidal capacity of P. terebinthaceum and would provide some information for the development of new strategies in the control of insect pests.DOI http://doi.org/10.25135/rnp.149.19.05.1287 (DOI number will be activated after the manuscript has been available in an issue.) Keywords Fumigant toxicity Contact toxicity Tribolium castaneum Herbst Lasioderma serricorne Fabricius Liposcelis bostrychophila Badonnel Available online: October 14, 2019 DETAILS DOWNLOAD PDF © ACG Publications. All rights reserved.