9 deoxygoniopypyrone 1 9-deoxygoniopypyrone 1 Antioxidant activity 1 Antioxidants 1 Aporphines 1 Benzamides 1 Cinnamates 1 Cytotoxicity 1 Goniomicins A-D Goniothalamus 1 Goniothalamus tapisoides 1 HT29 Cells 1 Heterocyclic Compounds 1 Humans 1 IC 50 1 Inhibitory Concentration 50 1 Lactones 1 Magnetic Resonance Spectroscopy 1 Plant Bark 1 Plant Extracts 1 Plant Stems 1 Pyrans 1 Pyrones 1 Sesquiterpenes 1 Tapisoidin 1 antioxidant 1 aporphine derivative 1 article 1 bark 1 benzamide 1