Fig. 5From: Auto-oxidation of Ent-beyer-15-en-19-al isolated from the essential oil of the heartwood of Erythroxylum monogynum Roxb.: formation of 15,16-epoxy-ent-beyeran-19-oic acid and other products3D structures of 6a and 6b showing NOE observed in Selective NOESY gradient experiments of 6bBack to article page