Three new quinones from (Fabaceae) and investigation of their bioactivity in BV-2 microglial cells.

Three new quinones were isolated from , identified as sennaquinone A (), quinquangulin-6--[α-L-rhamnopyranoside-(1→6)-β-D-glucopyranoside] () and rubrofusarin-6--[β-(6'-()-crotonylglucopyranoside] (), and nine other known compounds identified as quinquangulone () rubrofusarin-6--[-L-rhamnopyranoside-(1→6)-β-D-glucopyranoside] (), norrubrofusarin-6--β--glucopyranoside (cassiaside) (), rubrofusarin-6--β-D-glucopyranoside (), vanillic acid (), protocatechuic acid (), quercetin-3--sambubioside (), resveratrol (), and vomifoliol (). These compounds were determined by HR-ESI-MS, 1D and 2D NMR analyses and ECD calculation. The cytotoxicity of compounds , , and was first assessed in BV-2 microglial cell line by MTT assay.

Dolichocarpols G-X: Previously undescribed macrocyclic humulene sesquiterpenoids from Anaxagorea dolichocarpa.

Eleven previously undescribed macrocyclic humulene sesquiterpenoids, dolichocarpols G-Q (1-11), five undescribed bicyclic, dolichocarpols R-V (12-16) and two undescribed norsesquiterpenes, dolichocarpols W-X (17-18) were isolated from the roots of Anaxagorea dolichocarpa. Their structures were unequivocally determined by the analysis of NMR, HRESIMS, and IR data, along with NMR and ECD quantum-mechanical calculations, followed by the application of the DP4+ method. Most compounds possess an ether bridge between different carbons, whereas compounds 13/14 and 15/16 are diastereomers isomerized at C-7/C-10 and at C-7/C-10/C-12, respectively.

Potential In Vitro Antimelanoma Effect of the Essential Oil from Croton grewioides Baill.

Cancer is a group of diseases characterized by uncontrolled cell growth, invasive capacity, and metastatic potential. Despite the continual progress in cancer treatment, high toxicity and resistance to therapy remain recurring challenges. Croton grewioides Baill.

In Silico and In Vitro Evaluation of the Antifungal Activity of a New Chromone Derivative against spp.

species are frequently implicated in the development of both superficial and invasive fungal infections, which can impact vital organs. In the quest for novel strategies to combat fungal infections, there has been growing interest in exploring synthetic and semi-synthetic products, particularly chromone derivatives, renowned for their antimicrobial properties. In the analysis of the antifungal activity of the compound ()-benzylidene-chroman-4-one against , in silico and laboratory tests were performed to predict possible mechanisms of action pathways, and in vitro tests were performed to determine antifungal activity (MIC and MFC), to verify potential modes of action on the fungal cell membrane and wall, and to assess cytotoxicity in human keratinocytes.

Chemical Composition, In Vitro Antitumor Effect, and Toxicity in Zebrafish of the Essential Oil from (L.) Cronquist (Asteraceae).

The essential oil from (Asteraceae) aerial parts (CBEO) was extracted by hydrodistillation in a Clevenger-type apparatus and was characterized by gas chromatography-mass spectrometry. The antitumor potential was evaluated against human tumor cell lines (melanoma, cervical, colorectal, and leukemias), as well as non-tumor keratinocyte lines using the MTT assay. The effect of CBEO on the production of Reactive Oxygen Species (ROS) was evaluated by DCFH-DA assay, and a protection assay using the antioxidant N-acetyl-L-cysteine (NAC) was also performed.