11 research outputs found
Absolute configuration of two new 6-alkylated alpha-pyrones (=2H-Pyran-2-ones) from Ravensara crassifolia.
The stem bark CH2Cl2 extract of Ravensara crassifolia showed antifungal activity against the phytopathogenic fungus Cladosporium cucumerinum in a bioautographic TLC assay. Activity-guided fractionation afforded two new alpha -pyrones : (6S)-5,6-dihydro-6-[(2R)-2-hydroxy-6-phenylhexyl]-2H-pyran-2-one (1) and (6R)-6-[(4R,6R)-4,6-dihydroxy-10-phenyldec-1-enyl]-5,6-dihydro-2H-pyran-2-one (2). Their structures and absolute configurations were established by NMR spectroscopy, chemical methods, and CD spectroscopy. The antifungal activity against C. cucumerinum was determined for both compounds
Simultaneous quantification os asiaticoside, asiatic acid, madecassoside and madecassic acid in leaves of Centella asiatica (L.) urb.
Advanced Modeling and Simulation Tools to Address Build-Up Issues in Additive Manufacturing by Cold Spray
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