Curso de Pós‐Gradua??o em Química Organica, Departamento de Química Organica e Inorganica, Universidade Federal do Ceará, Cx. Postal12200, 60.021‐940, Fortaleza‐CE, Brazil
Abstract:
A NMR study of two new pterocarpans isolated from the roots of Harpalyce brasiliana is described. In addition to 1D NMR, 2D shift-correlated NMR pulse sequences ((1)H-(1)H-COSY, HSQC and HMBC) were used to establish the structures, and unambiguously perform the (1)H and (13)C chemical shift assignments.