OOIR: Observatory of International Research

Papers

(The H4-Index of Journal of Natural Products is 27. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2022-01-01 to 2026-01-01.)

Article	Citations
Probing the Cytotoxic Signaling Induced by Eupenifeldin in Ovarian Cancer Models	108
Zelkovamycins F and G, Cyclopeptides with Cα-Methyl-threonine Residues, from an Endophytic Kitasatospora sp.	87
Bioactive Cyclodepsipeptides from Cocultured Mangrove-Derived Aspergillus sp. and Penicillium sp.	56
Issue Publication Information	53
Discovery of Chalcone Derivatives as Bifunctional Molecules with Anti-SARS-CoV-2 and Anti-inflammatory Activities	47
Reconsideration of the Structures of Stemara-13(14)-en-18-ol and Related Diterpene Natural Products: Vinylic Hydrogen Chemical Shifts Are Key	44
Veraguamide E, a Marine Cyanobacterial Depsipeptide Targeting σ ₂ R/TMEM97: Chemical and Neurobiological Characterization	40
Proteomic Changes in Methicillin-Resistant Staphylococcus aureus Exposed to Cannabinoids	39
The Significance of Hypervariability and Conserved Motifs in Antimicrobial Peptides from Tree Frogs	37
Ouhanamide, an Antiparasitic Linear Lipopeptide from a Marine Okeania sp. Cyanobacterium	36
Insights into the Biosynthesis of Kibdelomycin and Amycolamicin from Comparative Biosynthetic Gene Cluster Analysis and Precursor Incorporation Studies	35
Triquinane Sesquiterpene Glycosides from the Basidiomycete Antrodiella zonata	35
Efficient Production of Flavonoid Glucuronides in Escherichia coli Using Flavonoid O-Glucuronosyltransferases Characterized from Marchantia polymorpha	35
Diterpenoids from Sauropus spatulifolius Leaves with Antimicrobial Activities	34
Palladium-Catalyzed Direct Synthesis and Insecticidal Activity of Arylmatrine Derivatives	33
Peniandranoids A–E: Meroterpenoids with Antiviral and Immunosuppressive Activity from a Penicillium sp.	32
Isolation and Biological Activity of 9-epiTetrodotoxin and Isolation of Tb-242B, Possible Biosynthetic Shunt Products of Tetrodotoxin from Pufferfish	32
(±)-Polysiphenol and Other Analogues via Symmetrical Intermolecular Dimerizations: A Synthetic, Spectroscopic, Structural, and Computational Study	32
Cadinane-Type Sesquiterpenoids with Cytotoxic Activity from the Infected Stems of the Semi-mangrove Hibiscus tiliaceus	31
Discovery and Heterologous Expression of Functional 4- O -Dimethylallyl- l -tyrosine Synthases from Li	30
Aspulvins A–H, Aspulvinone Analogues with SARS-CoV-2 M^pro Inhibitory and Anti-inflammatory Activities from an Endophytic Cladosporium sp.	30
Glenthmycins A–M: Macrocyclic Spirotetronate Polyketide Antibacterials from the Australian Pasture Plant-Derived Streptomyces sp. CMB-PB041	29
Enigmazole C: A Cytotoxic Macrocyclic Lactone and Its Ring-Opened Derivatives from a New Species of Homophymia Sponge	29
Biochemical and Structural Studies of the Carminomycin 4-O-Methyltransferase DnrK	29
Platanosides, a Potential Botanical Drug Combination, Decrease Liver Injury Caused by Acetaminophen Overdose in Mice	29

Laeviganoids A–T, ent-Clerodane-Type Diterpenoids from Croton laevigatus	28
A Very Deep Graph Convolutional Network for¹³C NMR Chemical Shift Calculations with Density Functional Theory Level Performance for Structure Assignment	27
Drymariamides A–J, Antiadipogenic Cyclopeptides Incorporating Noncanonical Amino Acids from Drymaria cordata	27