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Lignanamides and other phenolic constituents from the bark of kenaf (Hibiscus cannabinus)

2001; Elsevier BV; Volume: 58; Issue: 8 Linguagem: Inglês

10.1016/s0031-9422(01)00311-9

1873-3700

Ana M. L. Seca, Artur M. S. Silva, Armando J. D. Silvestre, José A. S. Cavaleiro, Fernando M. J. Domingues, Carlos Pascoal Neto,

Hibiscus Plant Research Studies

Two new acyclic phenylpropane lignanamides, grossamide K and erythro-canabisine H, and the naphthol glucoside 2,5-dimethyl-3-O-β-d-glucopyranosylnaphthol, along with six known compounds were isolated from the acetone extract of bark of Hibiscus cannabinus. All structures were established by spectroscopic methods including 2D NMR techniques, which allowed the correction of certain previously reported 13C NMR assignments of grossamide.