... Vitamin E in antioxidant activity. The bark also contains isomagnolol, essential oils (eudesmol, maschilol, pinene), alkaloids (magnoflorine, salicifoline, magnocurarine), and tannin. The ... unopened flower buds contain essential oils (anethole, camphene, cineol, estragole, eugenol, limonene, pinene, safrole), alkaloids, and ...