Accordingly, we described in this study detailed 1D ( 1 H/ 13 C) and 2D NMR spectral data of 1 (Table ), which we give a trivial name abundisporin. COOH derivative of the plant metabolites epipolypiperic acid and isopolygonal acid. The relative configuration of 2 was determined by ROESY spectrum (Figure ) that revealed NOE correlations between two methyl groups (Me-14 and Me-15) indicating that they are both on the same face of the structure whereas H-5 and H-7 revealed key common NOE correlations indicating that they are on the opposite face.