Knecorticosanones C–H from the fruits of Knema globularia (Lam.) warb†
Abstract
Six undescribed polyketides, 1–6, were discovered from the fruits of Knema globularia (Lam.) warb. Two known polyketides and three known lignans were also isolated. Cytotoxicities against HepG2 and KKU-M156 cells of all polyketides were evaluated. Compound 1 displayed the most cytotoxic activity against HepG2 and KKU-M156 cell lines with IC50 values of 1.57 ± 0.37 and 1.78 ± 0.14 μg mL−1, respectively. The structure of all isolates was identified using spectroscopic methods including NMR, IR, MS and ECD.