Protoflavanones from the Wood Stem of Salvertia convallariodora.
Mariana L De MesquitaJosé E De PaulaLaila S EspindolaLuiz A L SoaresTania M G Da SilvaCelso A CamaraTelma M G Da SilvaPublished in: Natural product communications (2019)
Phytochemical-analysis of the ethyl acetate extract of stem wood of Salvertia convallariodora A. St.-Hil. (Vochysiaceae), a Brazilian Cerrado species, led to the isolation and full characterization of three new non-aromatic B-ring flavanones (1-3) as well as the terpene mixture of sericic acid (4), 24-hydroxytormentic acid (5); 24-hydroxytormentic acid glucosyl ester (6), and sericoside (7), all identified for the first time from S. convallariodora. The structures of the new flavanones (1-3) were established from IR, LC-PDA-qTOF-MS, and NMR spectral data, including 2D NMR experiments.