Two new pterocarpans and a new pyrone derivative with cytotoxic activities from Ptycholobium contortum (N.E.Br.) Brummitt (Leguminosae): revised NMR assignment of mundulea lactone

Chemistry, Stereochemistry, Pyrone, Cytotoxicity, Lactone, Two-dimensional nuclear magnetic resonance spectroscopy, Derivative (finance), In vitro, Biochemistry