Diabetes and its complications represent a major global health burden, contributing to rising mortality rates, escalating healthcare costs, and an increasing prevalence worldwide. This has driven renewed interest in traditional medicine as a complementary approach to disease management. Cochlospermum vitifolium (Wild) Sprengel, a medicinal plant traditionally used to treat kidney pain, liver disorders (including hepatitis C and jaundice), and metabolic syndrome, has demonstrated promising antidiabetic potential. Previous studies report hypoglycemic effects in both in vitro and short-term in vivo models. In this study, we evaluated the hypoglycemic activity of tetrahydrofuran (THF) extracts from C. vitifolium heartwood and bark in mice over a six-week period (500 mg/kg dose). The heartwood extract exhibited notable antioxidant activity, scavenging over 50 % of DPPH radicals at 3.2 mg/mL, while the bark extract showed higher potency at 1.5 mg/mL. Both extracts demonstrated genoprotective effects at doses of 250 and 500 mg/kg, mitigating damage from mutagenic agents. Notably, the heartwood extracts significantly reduced blood glucose levels from > 300 mg/dL to < 100 mg/dL, whereas the bark extract had no significant hypoglycemic effect. These findings suggest that C. vitifolium extracts, particularly from the heartwood, may modulate oxidative stress-related pathways implicated in chronic degenerative diseases such as diabetes. Further research is warranted to elucidate the underlying mechanisms and long-term safety profile of these extracts.

Polymorphism critically influences the solid-state properties of organic molecules, affecting stability, solubility, and functionality. We investigated the polymorphic behavior of enantiomerically pure (+)-(6aS,11aS)-medicarpin through combined experimental and computational analyses. Single-crystal X-ray diffraction revealed two distinct chiral polymorphs: the previously reported monoclinic P2₁ form and a newly identified orthorhombic P2₁2₁2₁ form with a fully chiral packing arrangement. The discovery of this previously unreported polymorph underscores the subtle yet decisive effects of solvent and conformational flexibility in directing crystallization. Detailed structural analysis reveals that, whereas the P2₁ form is only stabilized by a single dominant electrostatic interaction, the P2₁2₁2₁ form features a more complex network comprising C-H···π contacts, bifurcated C-H···O hydrogen bonds, and aromatic edge-to-face interactions. Further investigation of a functionalized p-nitrobenzoate derivative corroborates the critical influence of molecular substituents and crystallization conditions on packing motifs. Lattice energy DFT calculations confirm that each polymorph is stabilized by distinct electrostatic and dispersive interaction patterns, illustrating the complex energetic landscape of polymorph selection. Altogether, this work provides a framework for understanding and anticipating which polymorph is likely to form under specific solvent and crystallization conditions, offering insights for future strategies in materials design and guiding the pursuit of patentable crystalline forms in pharmaceutical applications.

Medicarpin, a natural pterocarpan phytoalexin, contributes to tree defense against microbial decay, particularly from the aggressive white-rot fungus Trametes versicolor, an ASTM standard for wood durability testing. To improve upon the inhibitory effect of medicarpin against this fungus (150 mg/L), eleven derivatives were synthesized and evaluated. The acetylated analog demonstrated superior activity, achieving complete growth inhibition at 100 mg/L. To establish a structure–activity relationship, molecular docking was performed on the copper cluster on fungal laccase, the primary oxidative enzyme of T. versicolor. The acetylated derivative bound the T1 copper site with a more favorable free energy (−8.5 kcal/mol) than the parent compound, exhibiting enhanced stabilizing interactions and a binding pose anchored closer to the trinuclear copper cluster (TNC). These results were corroborated by 80 ns molecular dynamics simulations, confirming complex stability and the persistence of key interactions. This study demonstrates that targeted chemical modification of natural phytoalexins can significantly improve their antifungal potency. The superior performance of the acetylated medicarpin derivative, linked to optimized binding at the laccase active site, establishes a clear structure–activity relationship and highlights the potential of such engineered compounds as leads for next-generation, bio-inspired wood preservatives.