Meroterpenoids from and their anti-inflammatory activities.

Three meroterpenoids, including one new compound, ranhuadujuanine E (), one new natural product, methyl ()-3-(3,7-dimethylocta-2,6-dien-1-yl)-2,4-dihydroxy-6-methylbenzoate (), and one known compound, ranhuadujuanine D (), along with two known sesquiterpenoids (-) were isolated from . Their structures were elucidated on the basis of extensive spectroscopic analysis, and the absolute configuration of C-6' in compound was assigned by using Snatzke's method. Compounds - had inhibitory effects on LPS-induced NO release in RAW264.

A high-flux, photocatalytic wood-derived filter for high-efficiency water purification.

Wastewater purification has evolved into a global problem in the face of increasing scarcity of freshwater resources. Photocatalysis technology possesses prominent advantages in treating pollutants in water because of its low cost and mild reaction conditions, which provides an effective way to treat multiple pollutants and reduce membrane fouling. Herein, we combine photocatalysis technology with filtration technology via in situ reduction Bi with BiSiO strategy incorporating a carbonized wood filter to synthesize carbon/BiSiO@Bi bi-functional composite.

Study of Prefabricated Crack Propagation on Monocrystalline Silicon Surfaces for Grinding Damage Analysis.

Crack generation and propagation are critical aspects of grinding processes for hard and brittle materials. Despite extensive research, the impact of residual cracks from coarse grinding on the cracks generated during fine grinding remains unexplored. This study aims to bridge this gap by examining the propagation law of existing cracks under indentation using the extended finite element method.

Honokiol and magnolol: A review of structure-activity relationships of their derivatives.

Honokiol (HK) and magnolol (MAG) are typical representatives of neolignans possessing a wide range of biological activities and are employed as traditional medicines in Asia. In the past few decades, HK and MAG have been proven to be promising chemical scaffolds for the development of novel neolignan drugs. This review focuses on recent advances in the medicinal chemistry of HK and MAG derivatives, especially their structure-activity relationships.

Recent advances on cyclodepsipeptides: biologically active compounds for drug research.

Cyclodepsipeptides are a large family of peptide-related natural products consisting of hydroxy and amino acids linked by amide and ester bonds. A number of cyclodepsipeptides have been isolated and characterized from fungi and bacteria. Most of them showed antitumor, antifungal, antiviral, antimalarial, and antitrypanosomal properties.

Cytotoxic Cyclodepsipeptides and Cyclopentane Derivatives from a Plant-Associated Fungus sp.

In this work, four new cyclodepsipeptides, fusarihexins C-E (-) and enniatin Q (), four new cyclopentane derivatives, fusarilins A-D (-), together with eight known compounds (-), were isolated from cultures of the endophytic fungus sp. The structures of the isolated compounds were elucidated by analysis of HRMS and NMR spectroscopic data. The absolute configurations were determined using Marfey's method, a modified Mosher's method, single-crystal X-ray diffraction analysis, and ECD analysis.

Recent advances in medicinal chemistry of oleanolic acid derivatives.

Oleanolic acid (OA), a ubiquitous pentacyclic oleanane-type triterpene isolated from edible and medicinal plants, exhibits a wide spectrum of pharmacological activities and tremendous therapeutic potential. However, the undesirable pharmacokinetic properties limit its application and development. Numerous researches on structural modifications of OA have been carried out to overcome this limitation and improve its pharmacokinetic and therapeutic properties.

Structure Elucidation and Anti-Tumor Activities of Trichothecenes from Endophytic Fungus .

The secondary metabolites of , an endophytic fungus with anti-tumor activity isolated from Tsiang, were investigated. Five trichothecenes, including one previously undescribed metabolite, were isolated and identified. Their structures were elucidated by means of extensive spectroscopic methods; the absolute configuration of compound was determined by the ECD method.