Burke, S.J.; Jacobs, Helen M. ; McLean, Stewart; Reynolds, Williams F.
Author Affiliation, Ana.
Department of Chemistry
Structural and spectral assignment by 2D NMR of a new prenylated benzopyrancarboxylic acid and structural reassignment of a related compound
Magnetic resonance in chemistry
Date of Publication
A new prenylated benzopyrancarboxylic acid, 1a (3,4-dihydro-5-hydroxy-2,7-dimenthyl-8-(2-methlyl-2butenyl)-2-(4 methyl-1, 3-pentadienyl) -2H-1-benzopyran-6-carboxylic acid) was isolated from Peperomia amplexicaulis and fully characterized by 1D and 2D NMR and high-resolution mass spectrometry. In the course of this investigation, the structure of a related compound (minus the carboxylic acid group) which was previously assigned as 2b was corrected to structure 1b.....