Scheme 2From: 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 productsPossible pathways of formation of the epimeric epoxy hydroperoxides 6a and 6b, epimeric hydroperoxides 7 and 8, and the alcohol 9Back to article page